How many tablets are required in a hot tub? How many needed per litre/gallon?

Due to set ups and water conditions being different there is no definitive rule,.. The best way is to "balance" your hot tub water first, so you have the optimal levels before using chlorine tablets. Then add 2 or 3 tablets in a floating dispenser which should dissolve slowly over a number of days, monitor the chlorine levels with a test kit and adjust the flow of the dispenser until you have a constant desired chlorine level. Once you have the desired flow it's as simple as checking and replacing the tablets every 4-5 days.

Wil these fit into the little grey floater we got with our Intex 4 seater spa?

These are 1 inch tablets and should fit most floating dispensers...

How many tablets are recommended for a 12ft pool please and how much should the dispenser be open? Thanks

I had an 8ft pool and used 1 tablet with the dispenser open under half way. It took quite a while to dissolve and I found that if the chlorine was too strong, I just closed it a bit more to make it release slower.

Can I leave the tablets in the dispenser in the hot tub whilst bathing?

For safe bathing it is essential to remove chemical dispensers when using a hot tub, simply remove and then replace once finished with bathing.

Sapphire Waves 1kg 50x20g Premium Chlorine Tablets For Hot Tubs

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

💦 Keep your water flawless, fresh, and fuss-free with Sapphire Waves!

SUNLIGHT SHIELD - UV resistant technology keeps chlorine levels stable even under intense sun exposure.
TRUSTED PROVEN - Highly rated with 4.5 stars from 469 users who swear by its powerful, odor-free performance.
CRYSTAL CLEAR CLARITY - Premium 90% trichlor tablets ensure sparkling, bacteria-free water every time.
EFFORTLESS MAINTENANCE - Slow-release formula dissolves evenly over days, reducing chemical guesswork.
UNIVERSAL COMPATIBILITY - Perfect for hot tubs, swimming pools, spas, and even paddling pools—one solution for all.

Sapphire Waves Premium Chlorine Tablets deliver 90% trichlor purity in convenient 20g slow-dissolving tablets that sanitize and stabilize hot tubs and pools. Their UV resistant formula ensures long-lasting chlorine levels, maintaining crystal-clear, bacteria-free water effortlessly for 3-5 days per tablet. Suitable for all water types, these tablets are a trusted choice for professional-grade pool and spa care.

Specifications

ASIN	B091D6PS7B
Benefits	Kills bacteria and maintains clean, clear water
Best Sellers Rank	11,702 in Garden ( See Top 100 in Garden ) 181 in Chlorine
Brand	Sapphire Waves
Brand Name	Sapphire Waves
Country Of Origin	España
Customer Reviews	4.5 out of 5 stars 469 Reviews
Item Form	Tablet
Item Type Name	20g Premium Chlorine Tablets
Item Weight	1 Kilograms
Item form	Tablet
Item weight	1 Kilograms
Manufacturer	Stellar Life Ltd
Manufacturer Part Number	20g Premium Chlorine Tablets
Model Number	20g Premium Chlorine Tablets
Number of Items	1
Number of Packs	1
Product benefits	Kills bacteria and maintains clean, clear water
UPC	034966444066
Unit Count	50.0 count

Reviews

R**.

Excellent

Perfect size and effective and slowly dissolve giving a balance of chemicals and no nastey smell

2.09.2025

J**U

Amazing results highly recommended

These tablets are amazing n completely turnt my green water 2 clear n last ages. Can't believe the results I had. Highly recommend these used in just a standard chlorine tablet float/dispenser bought separately.

1.08.2025

C**S

reasonable price

seems fine

31.10.2025

D**J

All in one pool tablets.

Great work well, quick delivery. Thanks

4.08.2025

L**E

Very low maintenance with these tablets

Great tablets all in one, hassle free.

11.08.2025

P**N

Great value.

Great value item. Good chlorine content too.

3.07.2025

C**N

Best brand ever !!!!

These are the best ones I have come across will not buy any other 5 stars 🌟 highly recommend these

27.07.2025

A**R

Good value

Good value, does what is supposed to do.

3.05.2025

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