Clearwater Hot Tub, Spa & Swimming Pool Water Treatment, Lowers pH (1, pH Plus)
Reviewed 1 September 2026 · price checked live
Check price on Amazon →Overview
Clearwater Hot Tub, Spa & Swimming Pool Water sits in our pools, hot tubs & supplies listings, where we rank by how buyers actually rate a product rather than by brand. The manufacturer says: Increases the pH level of your spa or above ground pool to maintain comfortable pH levels for your skin whilst you’re enjoying your hot tub or pool. Ensures that your spa or pool stays hygienic and looking pristine so you can fully enjoy your experience. Those are the seller's own claims rather than our testing, so treat them as a starting point. On Amazon it holds 4.6 out of 5 from 7,931 ratings. What that score is worth next to its rivals is set out below.
- Brand
- Clearwater
- Amazon rating
- 4.6 / 5 from 7,931 ratings
- vs Pools, Hot Tubs & Supplies
- 0.1 above the category median of 4.5
- Rank in category
- 6 of 49 rated pools, hot tubs & supplies we track
- Price position
- Among the cheaper options (category spans £4.99 to £40.00)
- How proven
- Well established, above-average 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 4.6, 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 7,931 ratings against a category median of 1,112. That is enough of a base to take the score seriously without treating it as settled.
On price it sits in the lower third of a category running from £4.99 to £40.00, where the midpoint is about £12.99. Cheaper than most while rating at or above the category norm is the combination worth looking for, and it is the main argument for this one.
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
- Increases the pH level of your spa or above ground pool to maintain comfortable pH levels for your skin whilst you’re enjoying your hot tub or pool
- Ensures that your spa or pool stays hygienic and looking pristine so you can fully enjoy your experience
- Maintains the optimum pH level to enable chlorine treatment to work more effectively and clear any harmful bacteria
- Instructions are clearly stated on the bottle and it’s very simple to use- simply dissolve the recommended amount of pH chemicals in warm water and add the solution to the pool, increasing its pH level- check after minimum 4 hours
- Clearwater is a BISHTA approved member and recommended by brands such as Bestway and Lay-Z-Spa for reliable, safe and high-quality water treatment
