Pool RX 101001 6 Month Algaecide Blue Treats 7.5k-20k gallons, Single, Unit

This thing was advertised as a way to add less chemicals to your pool. Of course I found this after I stocked up on months worth of pool shock. You throw it in your pump basket or your skimmer basket and let it do it's thing killing algae for up to 6 months. Recommended to clean your filter first as you aren't supposed to clean in after installing for about 2 weeks. Needless to say I'm sitting on a pile of stocked up shock still since I haven't really needed a lick of it. I was so impressed I told my neighbor. He was so impressed he told his children and his friends. So far it seems to last longer in salt water pools but that's only my experience, you may get completely different results. I test my own water and balance everything myself, and I'm still on my first one. I bought a second for when the first does wear out but 8 months later its still going pretty strong keeping the water crystal clear.

I don’t often write reviews. However, this one I cannot let go by. We live in central Florida and have to fight to keep our pool clear at different times of the year. Between the rain, the sun and neighbors fertilizing their lawns. It can be a nightmare. I had just purchased this item and had to leave the next day to help with my father‘s estate. We happen to have to be gone 15 days. I was quite concerned we would come home with a pool so Green we wouldn’t be able to see the bottom. Not only is our pool nice and clear but the filter stayed at the same 10 psi as when we left. I will never be without this product. 100% purchase this!!

After all these years of this product and that product to battle green algae, I finally found PoolRX and its been a month now and our water is still crystal clear with no brushing, etc. Well worth the money! Happy Pool Owner, Jeff C.

By far the best thing I have ever used in my pool, literally just put it in the filter basket and watch it do its magic all season..

Did anyone else get foam on pool with this? It’s been in the pool 2 days, it did clear up the water but now with the foam I’m wondering if I should take it out?

UPDATE AFTER JUST OVER A MONTH:This is worth every single penny spent! Two days after I put this in my pool was completely algea free and has remained so. We have had very high temps and humidity (in the 100's) for the last month and my water has been clearer than when I filled it up when it was brand new. I did notice my pump was acting wonky after 5 days so I had to backwash which I was afraid would mess up the progress but it was fine (you're not supposed to backwash for 2 weeks after dropping it in). I did move it to the pump basket after that and no more issues. I have backwashed once since then. I put in one arm and hammer tablet and one chlorine tablet (clorox Xtra blue) once a week and my levels are always perfect. I haven't shocked my pool at all since adding this ball, the amount of money I'm saving on chemicals has made this ball very cost effective! I did notice this morning my pool isn't as clear as it has been and it's time for me to change out the ball. Probably didn't last as long because I backwashed after the first 5 days but I'm not complaining. I'll switch it out and enjoy another 5 weeks or so of a virtually maintenance free pool. Do not hesitate to order this!I didn't take a before picture but I swear this thing is a miracle worker! We put up a 17'x48" summerwaves pool last year and everything was great for 3 weeks. Then the yellow algea appeared. I triple shocked, vacuumed, brushed, over and over and over for weeks but the algea would never fully go away. The water would just be cloudy all the time. I kept my water balanced and just couldn't get it clear no matter what I tried. I finally drained it halfway and refilled, that helped for the last few months of summer but still, it never got really clear again. So this year I emptied the pool, gave it a good scrub and then started over. I had done my research and figured I knew what I did wrong. Things were great this season, opening the pool in May and for two months my water was perfect. Then we had the typical extreme heat and high humidity come in for a week, bam, yellow algea. I was frustrated. I gave it a good scrub and vacuum, and a quadruple shock. Two days later and zero difference. I saw this little thing, even though pricey, based on reviews I had to try it. It came in yesterday and I brushed the walls and floor, backwashed my sand filter and dropped this suckered in the bottom of the skimmer (I have a skimmer/pump that came with the pool and is not turned on, it's connected to the sand filter so putting it in the bottom of the skimmer is the same as putting it in the pump basket for reference). That was at 5pm yesterday. My pool had tons of yellow algea everywhere and the vacuum would only stir it up so I was hoping for a miracle. At 9am this morning I came outside and the pool is almost completely free of the yellow algea! I have a few small spots by the steps that I will see if the vaccum can get and if not I'll just brush it into the water to let the pump filter it out. This is so worth the money! I don't know how high my chlorine is because we have a tropical storm today and I really can't get out to mess with the pool but as of now, if it's too high and won't budge I am perfectly fine with draining some of the water to get rid of that, at least I know for sure algea won't be my problem in the future! If anything changes I will definitely update this review.