Orenda PR-10000-QT. Phosphate Remover Concentrate, 1-QT.

I have had an ongoing problem with black algae for years now. Algae eats phosphates so, if you can get rid of your phosphates, you have solved your problem. Last year, I had a phosphate level of over 2500 PPM and the only solution that I could find was a product called Phos-Free from Leslie's. It was expensive and it required that you clean your filter before application to the pool, then let the filter run for 48 straight hours, and then clean the filter AGAIN, which was a giant hassle to say the least, as I have a cartridge filter that takes 45 minutes to clean in the blazing sun. This got my phosphates down to around 800 PPM, which somewhat mitigated the problem without completely solving it. (Note: I really like Leslie's and appreciate that they have a store near me with water testing and I will continue to buy all of my other chemicals and tabs from them, which are great.) I just didn't want to deal with the Phos-Free process this year and tried Orenda out of laziness/desperation. It really works like magic. I poured 4 ounces in my 16,000 gallon pool and the water immediately clouded and stayed that way for an hour or so. I use it in conjunction with Leslie's Perfect weekly now. I have poured in 4 ounces three times so far this summer. My last phosphate level was 85 PPM. No black algae. Fantastic product!

Excellent product. Our phosphate level was over 3,000 ppb and this product was more effective than what is offered at our local pool stores. Highly recommend.

This stuff has worked phenomenally well for me. I have a 20K gallon pool and we do get a good bit of dust (I live in Arizona) that has a tendency to jack up the phosphates in my pool. I have seen other comments but have to say this is a way better product and value than PhosFree. Has reduced my phosphates about 75%, down to an acceptable level. No issues with the filter or pump.

I have been using this stuff for my pool for a while now and it takes care of removing the phosphate and much cheaper than from the local pool store.

Turns the pool water a milking white color for a day or so but once it clears up its a lot easier to control the algae. I have found a lot less need to buy a lot of the other chemicals the pool supply store wants to sell you. The overall chlorine use is lower. Maybe if the water in your area is different there maybe a need for other additives but in my area that's not the case.

Best phosphate remover I’ve ever used. I used a garden pump sprayer, while the filter was running, to spread it evenly over the surface of our salt water pool. We had so much phosphate the pool stayed cloudy for almost 3 days after application. Now the pool stays clear, no algae and it’s easier to keep the proper chlorine level. Use this once a year and your pool will be great.

This was recommended to me by my pool guy, and it worked amazingly well!

Works great. Just 3 ounces in my 16,000 gal. pool did the trick.