Black Diamond Stoneworks Ultimate Spa Filter Cleaner Fast-Acting Spray. Instant Clean for Hot Tub & Pool Filters Leaving Behind no Sticky Residue. Prolongs Filter Life and Pool Equipment. No Soaking

Works well!! Directions say to spray the filter… perhaps a sprayer on the bottle would make this easier…. Instead i used a spray bottle we had…after spray let filter sit for 5-15 minutes and used a garden hose nozzle (for extra pressure) and rinsed .. way cleaner than the soak it over nite method with the former cleaner we used

Worked just like it said it would. Great stuff to clean hot tub filters. Easy to use.

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..😊

It works just like they said it would.

Worked wonders on my pool filters. Seems to break down the gunk quickly and makes the cleaning process so much better and easier

The product works well and we have purchased it multiple times but we had a problem with the last gallon jug. The unopened jug started leaking from the bottom. We noticed a puddle and when picking up the jug it started leaking faster, fortunately we were able to transfer it quickly to another plastic bottle and only lost about a 1/4 of the jug.I've never seen a plastic jug leak from the seam and I hope it's not an indication of a drop in quality of the contents.

Works as described.

Not much expectations at first. But when used spa filter got cleaned. No soaking, just spraying. See photo before and after. Very impressive.