SUDS-ONLINE 500G Stabalised Chlorine Granules - Swimming Pool Chemicals & Spa
Reviewed 9 August 2026 · price checked live
Check price on Amazon →Overview
We track SUDS-ONLINE 500G Stabalised Chlorine Granules - Swimming Pool alongside 48 other pools, hot tubs & supplies products, comparing it on rating, how many people have rated it and what it currently costs. According to the listing: Our chlorine granules are manufactured with a stabilising agent to help prevent the destabilisation and destruction of the chlorine by sunlight and UV rays. Routinely use between 2-3ppm residual chlorine in small or domestic pools and 3-5ppm in public or heavily used pools. Those are the seller's own claims rather than our testing, so treat them as a starting point. On Amazon it holds 4.5 out of 5 from 1,952 ratings. What that score is worth next to its rivals is set out below.
- Brand
- SUDS-ONLINE
- Amazon rating
- 4.5 / 5 from 1,952 ratings
- vs Pools, Hot Tubs & Supplies
- level with the category median of 4.5
- Rank in category
- 16 of 49 rated pools, hot tubs & supplies we track
- Price position
- Mid-priced (category spans £4.99 to £26.99)
- How proven
- Moderate review volume
How it compares in Pools, Hot Tubs & Supplies
Across the 49 rated pools, hot tubs & supplies products we track, the typical score is 4.5 out of 5. This one sits at 4.5, which is around the middle of the category. Ratings alone will not separate it from its rivals here, so price and the specifics below matter more than the star count.
It carries 1,952 ratings against a category median of 1,068. That is enough of a base to take the score seriously without treating it as settled.
On price it sits in the middle third of a category running from £4.99 to £26.99, where the midpoint is about £14.99. That is the part of the range where most sensible buys sit, neither cutting corners nor paying for the name.
Worked out from the 49 pools, hot tubs & supplies products in our catalogue, not from the brand's own claims. How we rank →
Key features
- Our chlorine granules are manufactured with a stabilising agent to help prevent the destabilisation and destruction of the chlorine by sunlight and UV rays. This prolongs their usefulness as a sanitiser over other types of non-stabilised chlorine and makes them ideal for use in swimming pools, spas and hot tubs whether located indoor or outdoor. These chlorine granules should be routinely used to help maintain a safe bathing environment.
- Swimming Pools: Routinely use between 2-3ppm residual chlorine in small or domestic pools and 3-5ppm in public or heavily used pools. For each ppm of chlorine increase required use 40g per 25,000 Litres of water.
- Spas and Hot Tubs: To increase the free chlorine level by 2.5ppm, add 5 grams (a teaspoon). On average you should need approx. 1 teaspoon per person using the spa. Maintain a chlorine level of between 2-4ppm and a pH level of 7.2-7.6 in your spa. Re-adjust the pH balance to between 7.2-7.6 for optimum bathing comfort.
