I have been using the Nature 2 system for about 15 years and really think every pool should use them. I never get algae blooms and I keep the chlorine level below 1ppm. My swimming season is about 6 months here in Florida and I replace the cartridge in late April every year. They want you to replace it every 6 months but after November I don't care about how much chlorine is in the pool because I am not in it. Once in awhile we have guest from colder climates and they will use the pool in the winter but I am not so tolerant of below 80 degree water. I recommend that about every 4 or 5 years getting the whole system and not just the replacement cartridge as the inner parts wear out.
Verified purchase: Yes | Condition: New
Best deal out there on this product. Easy to exchange. Make sure pump is off and keep your old one for the winter to make your new one last longer. Helps keep water clear and use less chlorine.
Verified purchase: Yes | Condition: New
I think this product is an excellent value purchased on Ebay as the pool supply store price was almost double what I paid. It saves a lot of money on chlorine and I'm able to cut my chlorinator down to half as much chlorine when using this product.
Verified purchase: Yes | Condition: New
This cartridge keeps my spa water perfect. I replace it twice a year and never have a water problem. I also use a tablespoon of chlorine granules once a week, although I don't know if this is necessary. I've been using this regimen for 15 years.
Verified purchase: Yes | Condition: New
This filter is easy to install (2 minutes) and has helped get our pool crystal clear for the summer
Verified purchase: Yes | Condition: New
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