Black Diamond Stoneworks Ultimate Spa Filter Cleaner Fast-Acting Spray for Hot Tub, Jacuzzi & Pool Filters.

Works really well and easy to use! Seems to get the filters way more clean than just water spray!

Great cleaner! It works for our salt water hot tub filters. Just spray, wait for several mins and rinse. Way better than dealing with those tablets and submerging the 2 filters into solution. Plus you can’t beat the price in comparison with this tablets. I’ve used it for a year already. Just got my second jug of it.

Was recommended to use a product like this one when I got my hot tub and i'm glad that I do. It helps get all the scum off of the filter that gets sucked Into your filter and it smells nice and doesn't leave any type of a residue in the water after from what I can tell. I really like this product

Great product and great price. I use this to clean my spa's filter, and it works wonders. Highly recommended.

After some somewhat disappointing results from the rather harsh filter cleaner "soak" we had used for years, I figured there HAD to be a better alternative that did not involve dangerous things like sulfuric acid and what-not. So I started looking around on Amazon and stumbled across Black Diamond Ultimate (very impressive, especially after I read the reviews and watched the videos). Now, when I bought it, I was initially maybe not so impressed... That is, UNTIL I also noted the Aqua Comb pool filter cleaner hose-end tool (ASIN: B00GS580BC Item model number: 80661) which 'focuses' the stream of water when flushing the filter. The 'comb' REALLY 'focuses' the water deep into the filter folds, and after using the Black Diamond Ultimate, THIS is the perfect combination to complete the task. After using this 'combo' just once, as a test I took one of my older filters which was pretty ugly to say the very least, and which I was just about to throw away. BUT - one single treatment virtually "renewed' this very funky old filter (albeit, I waited about 30-45 minutes between treatment with Black Diamond and the 'hose-out' with the Aqua comb). But I gotta say, after using the original spa filter cleaner for ALL THOSE YEARS and arguably probably disposing of many filters that I 'trashed' simply because they looked like dirty garbage. But this is the answer I have been looking for and now I have THREE nice looking and very clean spa filters once again.. Four "thumbs-up" IMHO..😊