POOLPUREGarden Hose End Pre Filter for Pool, Hot Tub, Spa, Greatly Reduces Chlorine, Heavy Metals, Odor, Fits Any Standard 3/4" Garden Hose Thread, Up to 8,000 Gallons, 2 Pack

Used this to fill my hot tob as we have well water with high iron concentration. This thing is amazing, the water is clear and there is no iron deposit in sight. It works so well at filtering minerals that the ph was actually too low. Will buy again.Just be careful when the first splash of water comes out of the filter, it was black. My hot tub is white so I had to flush the first gallon of water that came out. Wish I had known.

works great, A little slow on flow

The filters worked perfectly to refill my pool 10000 gallons. Don’t put the water at full blast when filling. Next time I’ll just use 1 filter for 5000 gallons because they took all hardness out of the water. So I had to add hardness back in

I use it to refill my pool without adding iron. It has worked better that the one I bought for 2 times the cost last year.

Bought this to fill a 4545 gal pool using well water.It helped to reduce some of the water hardness, but it certainly did not fix filter it 100% was my initial thoughts.I dumped 4 gallons of liquid chlorine. The pool looked nasty. The next day I added one pouch of HTH sock it, and some Aquarius stain remover.The next morning, the pool was clear and I backwashed.Last year, after opening in a similar manner, the bottom of the pool was filled with rust that had to be vacuumed to waste. Barely any is visible this year.I will be ordering and using these every year from now on!