Nature 2 Limited A30 Above-Ground Pool Replacement Cartridge
May 18, 2016
Clear Pool
The unit does help cut the use of chlorine and it does help keep the algea growth down in mid summer. They are a bit pricey and you can accomplish the same thing with shock, in my mind. I tried two seasons without it and used shock in place of it. I found the cost worked out about the same. Going back to the cartridge this season.