Natural Chemistry Phosfree, 3-Liter

Natural Chemistry Phosfree is a game-changer for pool care! It works exactly as advertised, quickly reducing phosphates and helping keep algae from becoming a problem. Since using it, my pool water has stayed sparkling clear with much less maintenance needed. Easy to use, reliable, and worth every penny. Highly recommend to any pool owner!

I've been maintaining a pool for years and have tried countless products to deal with recurring algae issues, but nothing compares to PHOSfree. I started noticing persistent green tints even after shocking and brushing, so after some research I realized high phosphate levels were likely to blame. I added this to my skimmer as directed and within 48 hours, the cloudiness began to lift. By day 3, my pool was sparkling again.I tested phosphate levels before and after using it and saw a dramatic reduction from over 1000 ppb to under 100 ppb in one treatment.This has now become a staple in my regular maintenance. If you’ve been battling algae despite balanced water, check your phosphates—this product works wonders. Highly recommended!

Works well, but use as directed (no more than 48 ounces per application, then wait 2 days and backwash before adding more). Water will get slightly cloudy from the product but this clears up over night. Very effective in lowering my Phosphate levels from 1693 (which was way to high) down to 345. Will be adding a little more later this week. DO NOT SHOCK while using this product; the shock will kill the noPhos chemical and render it useless.

Works pretty good

We had a green algae problem from middle of last year onward. I would get algae along the bottom of our walls even though my Free Chlorine, PH, and Alkalinity were all perfect. I would by some Green to Clean, which would get rid of it for a bit, but then it would come right back days later. Eventually, I just closed the pool last September and blamed it on something wrong with our DE filter.This year, our filter broke so we got a new one (DE again). Same freakin' problem with Algae. Spent another $100 on Green to Clean and Chlorine, and the algae was still coming back along the bottom edges first - and then up the walls and along the floor.After reading a ton of reviews everywhere, I bought 2 bottles of this product. The pool was a pretty bad color of green about now, but we tested and poured the right amount noted this in anyway. We tested in 48 hrs, and emptied/refilled the DE in our filter (no bumping, as that would release a lot of algae back into the pool). We kept doing this ~3 or 4 times over the week (test Phosphate, pour in recommended amt, cycle DE) and we are now back on track!It did cost me ~1 25lb bag of DE, some chlorine, and time scrubbing the pool to loosen up the algae, but it worked! The phosphate level is below 100 now, and the pool is crystal blue. I turned our pump down so it is only on 8hrs per day (energy savings), as well as not having to dump 2 lbs of shock in every few days in addition to my inline chlorine feeder - just to stay ahead of this!We only used up 1 3liter bottle getting our 27' round pool in shape, but we will definitely be checking weekly and using our 2nd bottle thru the summer, closing, and next year. Must have this stuff on hand at all times!NOTES:- If you have a DE filter, expect to cycle the DE at least every day until the pool gets clean.- Don't forget to stir. This is a milky white product, and we thought it was clear for the longest time because the white stuff was on the bottom.Thanks for all the reviews - a huge help!UPDATE AFTER USING FOR 2 MONTHS: STILL NO ALGAE!! This is amazing stuff! Buying some more now (1/2 price) to have on hand for next year. I agree with another reviewer - this is the best kept secret at any pool supply store. Even if you don't have an algae problem yet, you should still get this stuff because you don't want an algae problem.UPDATE AFTER POOL OPENING FOLLOWING YEAR: STILL AMAZING!! I put the rest of my 3 liter jug into the pool at the end of last year, and this year we opened our pool late (mid June), and there was still no algae. We measured the Phosphate levels again, and they were fine. We went right to a maintenance dosage this year. When we opened our pool late in prior years, the pool looked like a swamp. It used to have flies, frogs, and some other weird swimming creatures. We couldn't even see the bottom of the pool. Now, after using this - it is amazing. Will never go back, and I always have an extra 3 liter on hand now!

This stuff works great. I add it once a week to my pool and it keeps my total phosphates at 0. I ran into some green algae a few weeks ago and added a double dose and had my water tested and right back to 0. Great product to add to your weekly routine for clear water! The price also beats most pool stores!

We dumped so much chlorine in with no end in sight. I had the water tested and the phosphates were through the roof. We used this product and the pool cleared up overnight. I haven’t retested the phosphate levels but the pool looked great so I have to assume the algae killed off with no phosphates left.

Works as it should. Good price compared to local retail.