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Message: [QUOTE="jenmazy, post: 311035, member: 8667"] This one says it has UV and ozone. Would I need an additional UV? Is it something that you could never have enough of and two would be better than one or would it be overkill? I am sorry for my ignorance. I am really trying to learn all of this, it is a lot to take in and understand. I just want to make sure I do it right and get all of the information to make the right decisions :) What I do not understand is why is ozone and UV not enough? What can chlorine do that they cannot? Crypto is chlorine resistant but UV and ozone kill it. A week ago I had no idea what ozone was besides something up in the sky that protected us from the suns rays. I read today that bottled water is treated with ozone. I really hate chlorine. My daughter has asthma and chlorine causes issues for her. When I started this pool I was going with salt but that is still chlorine right? I read something about how the salt is converted into chlorine to sanitize. I still prefer the salt to chlorine. If nothing works out and I cannot properly sanitize the pool with UV and ozone I will have the salt hooked up and get rid of the plants. I read today that the liner will work with salt water. Hopefully what I read about that is right. Thank you for your time and advice! This has been very helpful!! [/QUOTE]