Dosing float buying guide
Updated: 23 October 2026
You are looking at amazon.co.uk titles that all say chlorine dispenser, and the shelf price in this set runs from £4.99 to £38.99. A dosing float is a floating chamber that wets slow tablets through slots or a ring. This dosing float buying guide sorts the eleven listings on the [dosing float comparison](/hub/diy-supplies/dosing-float) into a 20 g mini, a thermometer float, an animal shell, and a solar lamp. Peter F. checked the stored listings, not a lab. A qualifying purchase can earn a commission at no extra cost to you.
You are looking at amazon.co.uk titles that all say chlorine dispenser, and the shelf price in this set runs from £4.99 to £38.99. A dosing float is a floating chamber that wets slow tablets through slots or a ring.
You are looking at amazon.co.uk titles that all say chlorine dispenser, and the shelf price in this set runs from £4.99 to £38.99. A dosing float is a floating chamber that wets slow tablets through slots or a ring. This dosing float buying guide sorts the eleven listings on the dosing float comparison into a 20 g mini, a thermometer float, an animal shell, and a solar lamp. Peter F. checked the stored listings, not a lab. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Tablet size | Light | UK review note | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Steinbach Steinbach Mini 20 g float | 20 g | No | Missing lid; ring spins | 8.8 | about £5.39 | View offer |
 Gre Gre FDP20 20 g float | 20 g | No | Holds tablets; rub mark | 8.6 | about £11.82 | View offer | |
| Alternative |  ZWOOS ZWOOS solar chlorine float | Up to four 3 inch | Solar RGB | No UK review | 8.6 | about £26.99 | View offer |
On this page
Four kinds of dosing float
Start with the job, not the picture. In this set only the Steinbach Mini at £5.39 and the Gre FDP20 at £11.82 state 20 g. Both are plain plastic, with no thermometer and no light. Gre names ABS and a four-year warranty in the bullets. Steinbach does not state a material.
A thermometer float counts only if the listing claims a meter. Acunny at £5.75, NEIQIUWING at £6.36, and Feirdhoo at £10.57 all claim one, and none has a written review that checks the reading. An animal shell is a shape: Jonuin at £12.99 claims five 3 inch or forty 1 inch tablets, and Lempefe at £20 names both a tortoise and a crocodile. A solar float is a lamp with a basket, which is why ZWOOS and Gaethra sit between £26.99 and £38.99. Match the tablet next, on the chlorine tablet size for a floater page.
What the listing must state
Three lines beat a lifestyle photo. Steinbach and Gre say 20 g. NEIQIUWING says 1.5 inch. Jonuin claims five 3 inch or forty 1 inch. Solar bullets claim about four 3 inch tablets. EduPlayte’s 5 inch title at £4.99 is the float, not a tablet.
EduPlayte states a dosage ring, Acunny adjustable rings, and Jonuin a bottom control ring. One UK review says the Steinbach blue ring spins the whole base. Gre’s bullets do not describe a ring. Steinbach is 4.4 from 2,370 and Gre is 4.3 from 427. A 5.0 from one review, with no text, is a star, not a comparison. Feirdhoo’s table says 8 × 8 × 1 cm against a 5 inch title. Gaethra’s says 8 × 7 × 6 cm against four 3 inch tablets. Skip a row until the listing agrees with itself.
Price bands in this set
The prices are the shelf figures in the captured amazon.co.uk files, not a survey of every shop. About £4.99 to £6.36 buys a small plastic holder: EduPlayte, Steinbach at £5.39, Acunny, and NEIQIUWING. In that band you compare a stated 20 g size and 2,370 reviews with a stated ring and almost no reviews, or a thermometer claim with no reviews.
About £10.57 to £20 is still not a lamp. Gre is £11.82, with ABS, a claimed four-year warranty, and 427 reviews. Jonuin is £12.99. Lempefe is £20. About £26.99 to £38.99 is the solar band. Most of that money is the lamp, the remote, and the battery claim. IP68 is the seller’s wording, not a dosing certificate. Which named row is the top pick is on the best chlorine float UK page.
Hot tub, liner, and what stays off this page
A hot tub changes the risk even when the float is the same object. One United Kingdom review of the Gre FDP20 says it left a black mark where it rubbed the shell. Move the float. PoolPro, a UK trade page, warns that slow chlorine tablets and a floater can bleach a vinyl-style hot-tub liner and cover, and it points those owners towards granules. Other UK shops still sell 20 g floats for hot tubs. This guide does not collapse those statements into a ban.
A private garden pool used only by you, your family, and your guests sits outside HSE guidance HSG179. A tub you let as a business is a different rule. Filling the chamber and lifting the float out before anyone swims are steps, not buying criteria, so they stay off this page.
Common questions
Do I need a float if the pool is small?
A small garden pool or paddling pool is the usual place for a 20 g float, because slow tablets should not sit on the liner. You still need a test kit, and you still follow the tablet label. A float does not measure chlorine or correct pH.
Is a £27 solar float a better chlorinator?
No. The ZWOOS single is £26.99 because it is a solar RGB light with an empty basket, not because the basket doses more carefully than a £5.39 Steinbach mini. The reviews in that file are not from the United Kingdom, and they talk about the light, the seal, and a fussy basket. Buy the lamp when you want light.
Will a 5 inch floater take 3 inch tablets?
Not on the strength of the words 5 inch. On EduPlayte and Feirdhoo, 5 inch is a body claim. Feirdhoo’s own table then says 8 × 8 × 1 cm, which cannot hold a 3 inch puck. Bestway’s 5 inch floater, outside this set, is specified for 1 inch tablets. Read the tablet line.
Can one float do chlorine and bromine together?
Do not put both in the same chamber. Happy Hot Tubs’ dispenser sheet says never to mix chlorine with bromine, and never to mix trichlor with calcium hypochlorite. Gaethra’s bullets name chlorine or bromine, not both in one fill. Wash an empty float outdoors before you change chemical, and do not mix the sludges. One chemistry per float.
Does a private garden pool need an HSE-approved doser?
No. HSG179 does not apply to a private domestic pool used only by the owner, family, and guests, and it does not cover a stand-alone spa. None of these floats carries an HSE approval, a PWTAG certificate, or a British Standard in the files, and this page does not invent one.
Related pages
Sources
Public UK sources and the amazon.co.uk listings compared on this page. Updated 22.10.2026.
- HSE: HSG179, Managing health and safety in swimming pools (retrieved 22.10.2026)
- HSE: Swimming pools (retrieved 22.10.2026)
- HSE: HSG282, Control of legionella and other infectious agents in spa-pool systems (retrieved 22.10.2026)
- PWTAG: Code of Practice (retrieved 22.10.2026)
- PWTAG: Technical note 68, swimming pool chemicals (retrieved 22.10.2026)
- Pool Warehouse UK: chlorine tablets 5 kg (retrieved 22.10.2026)
- Consumer Rights Act 2015 (retrieved 22.10.2026)