ULTIMA-PLUS XP Spa Water Clarifier - Transforms Hot Tub Water From Cloudy and Dirty to Crystal Clear - Suitable for all Hot Tubs, Spas and Pools (5 Litres)

A very good product does exactly what it says and keeps my water crystal clear

Actually got this to use in my Bestway outdoor pool, rather than a spa/hot-tub. The pool is 13ft diameter, and all summer season I try to keep the water clean using chlorine, anti-algae etc. Now and again the water does get cloudy so I use this product. I worked out capacity of the water in the pool and calculated the required dosage. When added, I let pump run a good 4-5 and then left it overnight. In morning, water was noticeably cleaner & clearer. After running pump another 1-2 in the morning water was perfectly crystal clear. Would recommend.

Well it definitely works as advertised. I would advise that if you use it in a spa (1200litre) then I would use a little less than recommended. Be prepared for the result. I would suggest using a spa net to remove some of the big collections of residue. Other than that it works very well, and with the size of the container it will last for some time. This is well value for money.

Really good , Helps restore a clear tub

I did buy this without reading the reviews first (D’oh). Used for 1st time and it actually made the hot tub worse. I then left this for a day and looked again, still cloudy but not as bad. Used another 2 cap fulls and left for another day. Thought it would be as bad, but actually really surprised, worked well. Yes there is a small smell, but after a day you can’t tell. A great item to clean the water will definitely buy again in a year once this is gone.