In the above sticky topic, Curing ICH Naturally, Catsma says: Question #1: I have a heavily planted aquarium with sand substrate, the roots have finally established and are *everywhere*. My only fish has one speck of ICH on his gill now, noticed it yesterday and it's still there. Any suggestions for dealing with the substrate saturated with plant roots? Question #2: I use a UV Sterilizer with a low flow rate to kill unwanted parasites. I use a powerhead to pump water to the inline sterilizer, and I have a "Quick-Attachment" to pre-filter installed. I don't know the size of ICH spores, but will they get mixed up with the pre-filter or go through it and become irradiated by the UV Lamp? Simply put, should I remove the pre-filter? Question #3: Is 86F safe for my Betta for two weeks? He's used to 75F.