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Best aquarium plant fertiliser

Updated: October 2026

You want one bottle from this amazon.co.uk set, and a reason to leave the others on the shelf. Best aquarium plant fertiliser only means something once the tank is named. A 4.6-star trace supplement is a poor complete feed, and a complete-style liquid is a poor choice when nitrate is already high. The [aquatic plant fertiliser comparison](/hub/fertiliser-soil-and-bark-mulch/aquatic-plant-fertiliser) lists all nine sizes, prices, and review counts from 19 October 2026. The Products Compared editorial team used those listings and the UK review samples stored with them. This is not a laboratory test. If you buy through our links, we may earn a commission at no extra cost to you.The type choice itself sits on the [buying guide](/hub/fertiliser-soil-and-bark-mulch/aquatic-plant-fertiliser/sub/aquatic-plant-fertiliser-buying-guide).

You want one bottle from this amazon.co.uk set, and a reason to leave the others on the shelf. Best aquarium plant fertiliser only means something once the tank is named.

Our top picks

Seachem Seachem Flourish 250 ml

Best overall

Seachem Seachem Flourish 250 ml
6.7/10about £8.90
View offer
Easy Life Easy-Life ProFito 500 ml

Rank 2

Easy Life Easy-Life ProFito 500 ml
8.6/10about £9.49
View offer
AquaDesign AquaDesign PLANT+ 500 ml

Alternative

AquaDesign AquaDesign PLANT+ 500 ml
7.3/10about £10.99
View offer
On this page
  1. 1.Best for a stocked, moderate tank
  2. 2.Best when you want a larger weekly dose
  3. 3.Best small bottle, and who should leave it
  4. 4.What not to crown

Best for a stocked, moderate tank

For a stocked community tank with moderate light and no injected CO2, Easy-Life ProFito 500 ml is the top pick in this set. On 19 October 2026 it was about £9.49, with 4.6 from 5,196 reviews. The listing says it contains no nitrates or phosphates and states 10 ml per 100 litres. Practical Fishkeeping's gear note treats ProFito as the all-rounder for most low to medium energy tanks. Skip it when a nitrate test on a fast, high-light tank sits near zero, if you need a pipette the listing does not include, or if you want a shrimp claim on the amazon bullets, which are silent. One reviewer reported corydoras dying within an hour of each of two doses. That is one report, not a measured cause. If nitrate is already high, stay with this bottle. If it is near zero under strong light, read the complete versus lite page.

Best when you want a larger weekly dose

AquaDesign PLANT+ 500 ml is the all-in-one to try when you want a bigger weekly volume than ProFito and a pipette. It was about £10.99, with 4.4 from 155 reviews. The listing dose is 10 ml per 30 litres a week, so a 100 litre tank is about 33 ml a week, against about 10 ml of ProFito. The short bullets do not state nitrate or phosphate, even though the title says complete. A 19 October 2026 product-text line calls the formula rich in nitrogen, phosphorus, and potassium. That line is not a percentage, and it is absent from the short bullets. Skip PLANT+ when the tank already runs high nitrate. Skip the 1,000 ml size as a first bottle: about £14.99, 4.2 from 80 reviews, the lowest stars here, with a pump marked 1 pump per 4 litres beside the weekly millilitre line. One reviewer reported a surface film that interfered with fish gulping air. Stop if that film returns.
Seachem Seachem Flourish 250 ml

Testsieger

Seachem Seachem Flourish 250 ml
6.7/10about £8.90
View offer

Best small bottle, and who should leave it

Seachem Flourish 250 ml is the small bottle with the deepest review file: about £8.90 and 4.6 from 9,794 reviews. The listing says it provides micro and trace elements and does not contain significant nitrogen or phosphorus. Seachem's own instructions, absent from the amazon bullets, are 5 ml per 250 litres once or twice a week, about 2 ml on a 100 litre tank. The maker publishes 0.0001% copper. The listing states no shrimp claim and no dose. Leave Flourish if this would be the only fertiliser on a high-light tank with few fish. One reviewer said the bottle comes up short of a full nutrient profile, which matches the listing. Three model numbers appear on the listing (001254, 020962, and 075233), so check the bottle you receive.

What not to crown

CARBO 2,500 ml is 4.6 from 71 reviews at about £19.99, and it is liquid carbon with a daily cap. Crowning it as the best fertiliser would mix a carbon source with a nutrient bottle. ProFito 1,000 ml is the best value on labelled weekly cost, about £0.15 a week for 100 litres against about £0.19 for the 500 ml size, but the listing weight of 110 g clashes with 540 g on the smaller bottle, so the 500 ml size stays the top pick. If the tank is stocked and moderate, start with ProFito 500 ml. If nitrate stays near zero under strong light, look at PLANT+ 500 ml and test. If you only need traces beside fish waste, leave Flourish when nitrogen is what you are short of.

Common questions

Which bottle is best for a normal community tank?
ProFito 500 ml, at about £9.49 with 4.6 from 5,196 reviews, for a stocked tank on moderate light. The listing adds no nitrates or phosphates, at 10 ml per 100 litres. Skip it if a fast tank under strong light tests near zero nitrate, because that tank needs a nitrogen source this bottle does not claim to be.
Which bottle is best with strong light and injected CO2?
PLANT+ 500 ml is the all-in-one in this set, at 10 ml per 30 litres a week. Use it when a nitrate test stays low. The short bullets do not print a nitrate percentage, so the complete word is the title plus a 19 October 2026 product-text line, not a lab analysis. If nitrate is already high, stay on ProFito or PLANT LITE.
Which bottle suits a small tank?
Flourish 250 ml is the smallest fill here, at about £8.90, and the amazon page does not print the dose. Seachem's own rate works out near 2 ml per 100 litres a dose, so a 40 litre tank is under 1 ml. The bottle can outlast the use within a few months of opening habit Seachem describes, which is the reason to skip it if you wanted a complete feed in one purchase.
Should I skip PLANT LITE if I wanted PLANT+?
Yes, if you wanted added nitrate and phosphate. PLANT LITE states that those are not added, at 10 ml per 50 litres a week. One buyer who already used PLANT+ found the lite formula less effective. The 500 ml lite bottle also has only nine reviews. Buy it when the nitrate-free line is the point, and skip it when you were shopping for the all-in-one.
Is CARBO a candidate for best fertiliser?
CARBO is a daily carbon dose, 1 ml per 50 litres, maximum 2 ml, at about £19.99 for 2,500 ml. Algae reviews on that listing disagree. It can sit beside a nutrient bottle. It is a weak candidate for the single bottle that feeds the plants, because iron and potassium are still outstanding.

Related pages

How to dose aquarium fertiliser

Aquatic plant fertiliser

Aquarium plant fertiliser buying guide: pick a type

Complete vs lite aquarium fertiliser for your tank

Liquid carbon aquarium fertiliser and the daily cap

Sources

Public UK and maker sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the nine amazon.co.uk listings captured on 19 October 2026. A shrimp-safe bullet is a listing claim. Flourish's copper figure is the maker's statement, not an independent UK lab test. CARBO's algae line is not confirmed here as an HSE authorisation.

  1. Practical Fishkeeping, growing aquarium plants (retrieved 19 October 2026)
  2. Practical Fishkeeping, gas versus liquid carbon (retrieved 19 October 2026)
  3. Seachem Flourish (retrieved 19 October 2026)
  4. Seachem Flourish dosing instructions (retrieved 19 October 2026)
  5. Easy-Life ProFito (retrieved 19 October 2026)
  6. GOV.UK, manufacturing and marketing fertilisers (retrieved 19 October 2026)
  7. GOV.UK, product labelling (retrieved 19 October 2026)
  8. HSE, regulated biocides (retrieved 19 October 2026)