A pool up to about 30 m³
You will test pH and put in one sachet a week. The Bayrol Soft & Easy 5.04 kg listing is about £82.50, with 4.6 from 317 reviews, and the file says 16 packs for up to 30 m³. Only one of 50 texts is from the UK.
Active oxygen pool comparison 2026
The best active oxygen pools, compared.
Top pick: Bayrol Soft & Easy, 5.04 kg (692) – Highest score in the set: about £82.50, 4.6 from 317 reviews, a complete weekly box listed to 30 m³. Only 1 of 50 texts is from the UK. Best value: AquaCare sanitiser, 1 L – About £13.99 for a named peroxide-and-silver liquid, 4.2 from 119 reviews, with 30 UK texts. The 30 m³ sachets already hold the top pick. Updated October 2026.
Active oxygen, on the UK market, is a shop name for chlorine-free oxidisers for domestic pools, usually a persulphate or hydrogen peroxide. A weekly treatment such as Bayrol Soft & Easy puts an oxidiser in one chamber of a sachet and an algaecide plus clarifier in the other, sized for pools up to about 20 m³ or 30 m³. Shock sold beside a chlorine residual was left out. The [active oxygen pool buying guide](/hub/pool-care/active-oxygen-pool/sub/active-oxygen-pool-buying-guide) separates complete granules, tablets that need a second biocide, and poured peroxide. It is usually a persulphate or hydrogen peroxide, and it is not the same product as non-chlorine shock. Persulphate oxygen does not sit in the water the way free chlorine does. Bayrol also notes that a chlorine shock is still allowed if the water fails. That is not a rule that chlorine and oxygen may always be mixed. You want disinfection plus algae prevention, not a shock that helps your sanitiser. The poured peroxide is 1 L, labelled stabilised hydrogen peroxide and silver.
Active oxygen, on the UK market, is a shop name for chlorine-free oxidisers for domestic pools, usually a persulphate or hydrogen peroxide.
18 products checked · 56 hrs invested · +21,400 readers
5 of 5: Best active oxygen pools compared
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1-2 of 5Best overall
Best value
4.9/10
8.9/10
8.3/10
7.8/10
3.3/10
∼ £92
∼ £83
∼ £81
∼ £14
∼ £116
5.0(2)
4.6(317)
4.6(185)
4.2(119)
–
Personal buying guide
Which active oxygen treatment fits this pool?
Question 1 of 2
What volume does the pool need the listing to cover?
The best active oxygen pools in detail
Our view
This second Soft & Easy listing, model 692, is 5.04 kg for a stated 30 m³ at £91.50, about £9 more than the other 5.04 kg page. amazon.co.uk shows 5.0 from two reviews, and the raw file has no review text, so those stars do not describe the water. A bullet says it is free from heavy metals and suitable for all basin types, including metal tanks, which the other Soft & Easy files do not state. The chemical is not named and no gram dose is printed. Number of packs is 1, against 16 on the £82.50 page, so this file does not show whether the box contents match. You are paying more for a thin listing of a product the other ASIN already carries with hundreds of ratings.
Pros
- Same stated 5.04 kg and 30 m³ as the other Soft & Easy box
- A bullet claims it is free of heavy metals and suitable for metal tanks
- Complete care is claimed, including hardness stabilisation
- A handle is listed on the bullets
Cons
- £91.50, about £9 above the other 5.04 kg listing
- 5.0 from 2 ratings and no review text in the file
- The chemical and a gram dose are not printed
- Pack count is 1, against 16 on the £82.50 page
Best for: You specifically want the model 692 listing and the metal-tank bullet, and you will not treat two stars as a record of how the water behaved.
Less suitable: You want the same stated box with hundreds of ratings, which is the £82.50 listing.
Specifications
- Model
- Bayrol Soft & Easy, 5.04 kg (692)
- Brand
- Bayrol
- Price
- ∼£92
- Customer rating
- 5.0/5(2)
- Product type
- Active-oxygen granules
- Pack size
- 5.04 kg
- Pool size
- 30 m³
- Dose printed
- No
- Packs listed
- 1
- Review file
- No review text
Common questions
Does this listing mention metal pools?
A bullet says it is free from heavy metals and suitable for all basin types, including metal tanks.
What do the two ratings say?
The listing line is 5.0 from 2 reviews. The raw file has no review text.
Is a dose printed?
No. The title and package size say 30 m³ and 5.04 kg. No gram dose is printed.
Our view
The Bayrol Soft & Easy 5.04 kg listing, model 4199215, is £82.50 for pools up to 30 m³, and the raw file says 16 packs. It is 4.6 from 317 amazon.co.uk reviews, the largest count in this set, which is why it is the top pick. Only one of the 50 texts is from the United Kingdom: an indoor-pool reviewer found the weekly sachets easy, with clearer water so far and none of the clumps they got from tablets, and they use about 20% under the pack dose because use is light. That same review says it is not cheap. More than one review from Germany or France reports no measurable oxygen after dosing and then algae, including a 30 m³ sand-filter pool after three double pouches. The listing does not name persulphate or peroxide. Its 16-packs line is not the 12 × 420 g count on UK shop pages, so those two figures stay separate.
Pros
- 5.04 kg listed for pools up to 30 m³ at £82.50
- 4.6 from 317 reviews, the largest count in this set
- One UK indoor-pool review: weekly sachets, clearer water, no tablet clumps
- Country of origin on the listing is the United Kingdom
- Shelf price sits close to the 20 m³ box
Cons
- Only 1 of 50 review texts is from the UK
- More than one non-UK review found no oxygen reading, then algae
- 16 packs on this listing is not the 12 × 420 g shop count
- The UK reviewer says it is not cheap
Best for: You have a pool up to about 30 m³ and you want the Soft & Easy listing with the most ratings, knowing almost none of the written reviews are British.
Less suitable: You have a paddling pool, you want a named liquid dose, or you need review texts you can read as UK experience.
Specifications
- Model
- Bayrol Soft & Easy, 5.04 kg
- Brand
- Bayrol
- Price
- ∼£83
- Customer rating
- 4.6/5(317)
- Product type
- Active-oxygen granules
- Pack size
- 5.04 kg
- Pool size
- Up to 30 m³
- Dose printed
- No
- Packs listed
- 16
- Review file
- 50 texts, 1 from the UK
Common questions
How many packs does the 5.04 kg listing state?
The raw file says 16 packs, 5040 g, for up to 30 m³. It does not say how many grams are in each bag.
Does the listing say how long the box lasts?
The page asks how long it lasts. The bullets do not answer.
How many of the review texts are from the UK?
One of the 50 texts in the file is from the United Kingdom. The listing line is 4.6 from 317 reviews.
Our view
The Bayrol Soft & Easy 4.48 kg box is listed at £81.33 for pools up to 20 m³, as pre-dosed active-oxygen sachets sold as chlorine-free complete care. On amazon.co.uk it is 4.6 from 185 reviews. Of 44 texts in the file, three are from the United Kingdom, so most of that star line is not British opinion. One UK reviewer with a 15 ft steel-frame pool said one sachet a week kept the water clear and they would not go back to their previous product. An English-language review from Germany says the oxygen is gone in about an hour, cannot be measured later, and algae can grow, and a separate German review says even a double dose left milky water. One UK review complains the seller was not based in the UK and communication about supply was poor. The listing does not name the chemical and does not print a gram dose.
Pros
- 4.48 kg listed for pools up to 20 m³
- Pre-dosed sachets sold as chlorine-free complete care
- 4.6 from 185 amazon.co.uk reviews
- One UK steel-frame review: one sachet a week and clear water
- £81.33
Cons
- Only 3 of 44 review texts are from the UK
- A non-UK review says the oxygen is gone in about an hour, then algae can grow
- One German review says a double dose still left milky water
- The chemical is not named and no gram dose is printed
Best for: You have a domestic pool around 20 m³, you will dose one sachet a week, and you can live with a star line that is mostly not from the UK.
Less suitable: You want the 30 m³ box, a named peroxide dose, or a long file of British reviews.
Specifications
- Model
- Bayrol Soft & Easy, 4.48 kg
- Brand
- Bayrol
- Price
- ∼£81
- Customer rating
- 4.6/5(185)
- Product type
- Active-oxygen granules
- Pack size
- 4.48 kg
- Pool size
- Up to 20 m³
- Dose printed
- No
- Review file
- 44 texts, 3 from the UK
Common questions
Does the 4.48 kg listing name the chemical?
No. It says active oxygen granules and chlorine-free complete care. It does not name persulphate or peroxide.
What pool size does the listing state?
Up to 20 m³. It does not print a gram dose or a sachet count.
Are the reviews in the file from the UK?
Three of the 44 texts are from the United Kingdom. The listing line is 4.6 from 185 reviews.
Our view
The AquaCare bottle is 1 litre at £13.99, and the highlight names stabilised hydrogen peroxide and silver. It is 4.2 from 119 amazon.co.uk reviews, and all 30 texts in the file are from the United Kingdom. That British review file, at a fraction of the sachet price, is why it is the best value here, for a hot tub, an ice bath, or a small pool rather than a 20 m³ install. Hot-tub reviewers describe clear water and little smell, and one cites about 400 ml on a fill and about 200 ml every 10 to 14 days. An 8-foot paddling pool a little over 2,000 litres needed more than the 1 litre bottle for one treatment, and two reviewers say test strips were advertised and were not in the parcel. Several texts report milky water, slime within two weeks, or a return to chlorine. The listing prints no pool volume and no dose, and a bullet’s claim that it breaks down to water and oxygen is not a measure of how strong the bottle is.
Pros
- £13.99 for 1 litre
- Stabilised hydrogen peroxide and silver named on the highlight
- 4.2 from 119 reviews, all 30 texts in the file from the UK
- Title covers pools, hot tubs, and ice baths
- Some UK reviewers report clear water and little smell
Cons
- No pool volume and no dose on the listing
- One 8-foot pool a little over 2,000 litres used more than 1 litre
- Milky water, slime, or a return to chlorine in several UK texts
- Two reviewers expected test strips that were not in the parcel
Best for: You have a hot tub, an ice bath, or a small pool, and you will judge the bottle from the UK reviews because the listing prints no dose.
Less suitable: You have a 20–30 m³ pool, or you need a weekly sachet with a stated volume.
Specifications
- Model
- AquaCare sanitiser, 1 L
- Brand
- AquaCare
- Price
- ∼£14
- Customer rating
- 4.2/5(119)
- Product type
- Poured liquid
- Chemistry
- Peroxide and silver
- Pack size
- 1 L
- Dose printed
- No
- Review file
- 30 UK texts
Common questions
What chemistry does the listing name?
The item highlight says stabilised hydrogen peroxide and silver. A bullet says it breaks down to water and oxygen.
Does the listing print a dose?
No. Volume is not stated. Reviewers describe their own amounts, including a 1,000-litre paddling pool and an 8-foot pool a little over 2,000 litres.
Do the reviews mention test strips in the box?
Two UK reviews say strips were advertised and were not in the parcel. The bullets in the raw file do not list strips.
Our view
The Relax 5 kg oxygen tablets are listed at £116.27, the highest price in this set, and the bullets say to use them with Micro-Cide and Clear Tabs, which are not in this box. The printed dose is 9 tablets per 45.5 m³ to start, then 5 tablets per 45.5 m³ each week, and tablet weight is not stated. There is no amazon.co.uk star line and no review text, so the file does not show whether that dose holds a residual. The chemistry is not named. A bullet tells you to test for an active-oxygen residual after treatment, without naming a tester. You are paying more than a Soft & Easy box for a tub the listing itself treats as one part of a set.
Pros
- Dose is printed: 9 then 5 tablets per 45.5 m³
- A non-chlorine formula is claimed
- The bullets tell you to test an active-oxygen residual after treatment
- 5 kg tub
Cons
- £116.27, and Micro-Cide and Clear Tabs are required and not in the box
- No star line and no review text
- Chemistry and tablet weight are not stated
- 45.5 m³ is a large pool beside a 20 m³ sachet box
Best for: You already use Micro-Cide and Clear Tabs and you want the tablet dose this listing prints.
Less suitable: You want one box the listing calls complete, or any product with a review file.
Specifications
- Model
- Relax oxygen tablets, 5 kg
- Brand
- Relax
- Price
- ∼£116
- Product type
- Oxygen tablets
- Pack size
- 5 kg
- Pool size
- Per 45.5 m³
- Partner product
- Yes
- Dose printed
- Yes
- Packs listed
- 1
- Review file
- No review text
Common questions
Is the tub a complete treatment on its own?
The bullets say to use the tablets with Micro-Cide and Clear Tabs. Those products are not in this listing.
What dose does the listing print?
9 tablets per 45.5 m³ for a first treatment, then 5 tablets per 45.5 m³ each week. Tablet weight is not stated.
Is there an Amazon rating in the file?
No customer-review line and no review text.
How we compared
Five active oxygen listings on amazon.co.uk were scored on 19 October 2026 from the listing facts and the saved review texts. This is not a lab test. Review record is up to 30, UK review texts up to 15, completeness up to 25, and price against that job up to 25. A star line from fewer than 10 ratings is capped, and no star line scores 0 on that part. Deductions cover repeated notes of no reading then algae, a duplicate listing with no text, missing strips, or a bottle that ran out on a stated small pool. The method does not give those deductions their own cap. On this page the four caps stay 30, 15, 25 and 25, and a 5-point deductions row brings the weights to 100. The product scores are the 0–100 figures already calculated. In sentences the highest score is the top pick. The best price against a usable job, once that top pick is assigned, is the best value.
1
Review record
30%Up to 30 points from the amazon.co.uk star line and how many ratings sit behind it. A line from fewer than 10 ratings is capped. No star line scores 0 on this part.
2
UK review texts
15%Up to 15 points for how much of the saved review text is from the United Kingdom. Stars can be high when the written reviews are not.
3
Completeness
25%Up to 25 points when the listing is a weekly treatment with a stated pool size. A tub that names partner products, or a liquid with no volume, scores lower.
4
Price against the job
25%Up to 25 points for the GBP shelf price set beside what the page actually is: a complete box, a named peroxide bottle, or tablets that need other products.
5
Deductions
5%5 points so the weights sum to 100. The method lists these cuts and does not publish a separate cap: repeated no-reading-then-algae notes, a duplicate listing with no text, missing strips, or a bottle that ran out on a stated small pool. The 0–100 scores already include them.
Independent review
Last updated: October 2026
8 sources checked
Active oxygen pool buying guide
Start with the product type, then the stated volume, then whether you can test that chemistry. Price comes after those three. The notes below follow that order for these five amazon.co.uk listings, scored on 19 October 2026. None of the scores is a lab test.
What is an active oxygen pool treatment?
Active oxygen, on the UK market, is a shop name for chlorine-free oxidisers used on domestic pools. It is usually a persulphate or hydrogen peroxide, and it is not the same product as non-chlorine shock. A weekly complete treatment such as Bayrol Soft & Easy puts an oxidiser in one chamber of a sachet and an algaecide plus clarifier in the other. Bayrol and UK dealers size those boxes for pools up to about 20 m³ or 30 m³. Persulphate oxygen does not sit in the water the way free chlorine does.
Best for
- A domestic pool around 20–30 m³ where you will test pH and dose a sachet every week
- A hot tub, ice bath or small pool, if you accept that the 1 L listing prints no dose
- Someone who already uses Micro-Cide and Clear Tabs and wants the printed tablet dose
Not ideal for
- A shock to sit beside a chlorine residual. That product is outside this comparison
- A paddling pool if the only pack you are holding is a 20 m³ or 30 m³ sachet box
- A business or holiday-let pool, or anyone reading two stars and no review text as a record
Mistakes to avoid
- 1
Buying shock as the sanitiser
Potassium peroxymonosulphate shock is sold beside a chlorine residual. It was removed from this set. A complete sachet is the weekly treatment. Shock is not that treatment.
- 2
Chlorine strips, or a test the next day
Chlorine strips do not read persulphate. Bayrol’s solid-dose check is one to two hours after dosing, at least 8 mg/L. The oxygen can be gone if you wait until the next day.
- 3
Reading the bottle as mild
A bullet that says the liquid breaks down to water and oxygen is not a measure of how strong it is. Dose one chamber of a double pouch, or skip a heatwave double-dose, and you have not followed the sachet either.
What to weigh up
Product type and stated volume
HighThe first question is what the listing is. Complete granules are Bayrol Soft & Easy, a double pouch each week, sold as chlorine-free, with Bayrol’s note that a chlorine shock is still allowed if the water fails. Tablets plus a second biocide are the Relax 5 kg tub: the bullets say to use them with Micro-Cide and Clear Tabs, which are not in the box, at about £116.27.
The test, the pH and the review file
HighChlorine strips do not read persulphate. Lovibond’s active-oxygen pooltester covers 0–10 mg/L with DPD No. 4. Bayrol wants the solid-dose reading one to two hours after dosing, at least 8 mg/L, and pH at 7.0–7.4 before the sachet. Hot or busy weeks take a double pouch. The same tester is not Bayrol’s method for liquid Bayrosoft. Testing the next day is the miss. Then read who wrote the reviews. The 5.04 kg top pick is 4.6 from 317 reviews, and only 1 of 50 texts is from the UK.
Which option suits you?
Three typical situations, each with a recommendation from this comparison.
A pool up to about 20 m³
The 4.48 kg Soft & Easy box is about £81.33 and states up to 20 m³. It is 4.6 from 185 reviews. Three of 44 texts are from the UK. It does not print a gram dose or a sachet count.
Hot tub, ice bath or small pool
AquaCare is 1 litre at about £13.99, with hydrogen peroxide and silver named on the highlight, and 4.2 from 119 reviews. All 30 texts on file are from the UK. The listing prints no pool volume and no dose.
Common questions about active oxygen pools
Which active oxygen pool treatment is the top pick in this set?
The top pick is Bayrol Soft & Easy 5.04 kg, about £82.50 on amazon.co.uk. It is 4.6 from 317 reviews, the largest count here, and the file says 16 packs for pools up to 30 m³. Only one of 50 review texts is from the United Kingdom, and more than one non-UK review found no oxygen reading, then algae. The score uses those listing facts. It is not a lab test, and it is not a claim that HSE has approved this box.
What is an active oxygen pool treatment, and is it non-chlorine shock?
Active oxygen, on the UK market, is a shop name for a chlorine-free oxidiser, usually a persulphate or hydrogen peroxide. It is not non-chlorine shock. A complete sachet such as Bayrol Soft & Easy puts an oxidiser in one chamber and an algaecide plus clarifier in the other. UK Pool Store sells potassium peroxymonosulphate shock beside a chlorine residual, and that shock is not in this comparison. Persulphate does not sit in the water the way free chlorine does.
How should you match the pack to the pool?
All Swim lists Soft & Easy as 16 × 280 g (4.48 kg) for 20 m³ and 12 × 420 g (5.04 kg) for 30 m³. The £82.50 amazon.co.uk listing says 16 packs on a 5.04 kg page for up to 30 m³. Those two counts are not one fact. The 4.48 kg listing states up to 20 m³ and prints no pack count. One pouch a week from a 12-pouch box is about 12 weeks as a rule of thumb, and heat can double the dose.
Will chlorine test strips read active oxygen?
No. Chlorine strips do not read persulphate. Lovibond’s active-oxygen pooltester covers 0–10 mg/L with DPD No. 4. Bayrol’s check for a solid dose is inside one to two hours, at least 8 mg/L, and that method is not the one Bayrol gives for liquid Bayrosoft. A free-chlorine strip will not show whether an oxygen sachet is still in the water the next day. Testers are a separate comparison: pool tester. Two AquaCare reviews also say strips were advertised and were not in the parcel.
What pH does Bayrol want before a sachet, and when do you test?
Bayrol wants pH at 7.0–7.4 before a Soft & Easy sachet. In a hot or busy week, double the weekly pouch. Use both chambers of a double pouch, with the pump on, and read the oxygen one to two hours later, not the next day. The £82.50 listing does not itself print a gram dose. The label on the box you have is the dose. Bayrol still allows a chlorine shock if the water fails. That is not a rule that the two may always be mixed.
Is peroxide enough for a holiday let or a spa?
Do not copy a garden-pool bottle onto a holiday let. East Renfrewshire’s holiday-let FAQ says peroxide alone is not enough and wants chlorine or bromine. HSE HSG282 describes silver-stabilised hydrogen peroxide for spa systems at about 100 ppm for a biofilm shock and about 50 ppm running, in a 30–70 ppm band. PWTAG’s Code of Practice models public pools on chlorine and does not set a domestic oxygen residual. Those figures are not one dose. Pool disinfectants are HSE product type 2, and the label is what you follow.
How much does active oxygen pool treatment cost on amazon.co.uk?
On these five amazon.co.uk shelves the prices run from about £13.99 to about £116.27. AquaCare 1 L is about £13.99. Bayrol Soft & Easy is about £81.33 for 4.48 kg, up to 20 m³, and about £82.50 for 5.04 kg, up to 30 m³. Model 692 is another 5.04 kg listing at about £91.50. Relax 5 kg tablets are about £116.27 and need Micro-Cide and Clear Tabs, which are not in the tub. All Swim listed the two Soft & Easy sizes at £67 and £72.
When should you call a professional instead of dosing the pool yourself?
Call a professional for a business or holiday-let pool, for green water you cannot clear, for a splash in the eye, or for a plant room that already doses liquid chlorine and acid. On a domestic pool the usual mistakes are different: buying shock as the sanitiser, using chlorine strips, testing oxygen the next day, dosing one chamber of a double pouch, or skipping a heatwave double-dose. A line that says the liquid breaks down to water and oxygen is not proof the bottle is mild.
Our verdict
In this set of five amazon.co.uk listings, the top pick is Bayrol Soft & Easy 5.04 kg at about £82.50. It is 4.6 from 317 reviews, the largest count here, and the file says 16 packs for pools up to 30 m³. Only one of 50 review texts is from the UK, and more than one non-UK review found no oxygen reading, then algae. The best value is AquaCare 1 L at about £13.99, with stabilised hydrogen peroxide and silver named on the highlight, 4.2 from 119 reviews, and 30 UK texts. It states no pool volume. The 4.48 kg box, the model 692 listing and the Relax tablets have no award. None of these scores is a lab test.
Best overallView offer
Bayrol Soft & Easy, 5.04 kg (692)
Highest score in the set: about £82.50, 4.6 from 317 reviews, a complete weekly box listed to 30 m³. Only 1 of 50 texts is from the UK.
Best value
View offer
AquaCare sanitiser, 1 L
About £13.99 for a named peroxide-and-silver liquid, 4.2 from 119 reviews, with 30 UK texts. The 30 m³ sachets already hold the top pick.
Editorial
Editor
DIY & toolsPool careamazon.co.uk listings
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Updated: October 2026
8 sources checked
Guides to active oxygen pools
Guides on what to look for, how to use a product, and common mistakes.
Active oxygen pool buying guideComplete granules, tablets plus a biocide, or peroxide, and why shock is outBest active oxygen poolThe five listings matched to pool size and to the review fileHow to dose active oxygenpH 7.0–7.4, pump on, both chambers, test within two hoursActive oxygen or chlorineSmell and skin against residual, algae and the weekly costActive oxygen for above-ground poolsSmall frames and paddling pools against these pack sizes
Related comparisons
Sources
Public UK sources from the research digest. Shelf prices and star lines are the amazon.co.uk figures in the display file, scored on 19 October 2026.
- Bayrol: Soft & Easy without chlorine (retrieved 19 October 2026)
- PoolStore: non-chlorine alternatives (retrieved 19 October 2026)
- HSE: biocide product types, product type 2 (retrieved 19 October 2026)
- HSE: HSG282, control of legionella in spa pools (retrieved 19 October 2026)
- PWTAG: Code of Practice (retrieved 19 October 2026)
- All Swim: Bayrol Soft & Easy (retrieved 19 October 2026)
- Lovibond: Pooltester active oxygen and pH (retrieved 19 October 2026)
- East Renfrewshire Council: legionella FAQs (retrieved 19 October 2026)
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the amazon.co.uk figures scored on 19 October 2026. We did not lab-test these active oxygen treatments.