I have 2 red wag platys 1 male 1 female and 1 fancy guppy male and 2 silver tipped tetras and 1 emerald cory cat in my 20G tank and water conditions are all perfect normal water temp is 78 deg. I noticed the female red wag platy swimming funny and tipping side to side and her fins were clamped especially her tail fin. I recently did a PWC 25% and noticed her symptoms shortly after. once I noticed her symptoms I raised teh water temp up to 82 deg. and she started doing better but it seems she is starting to look worse again it has been about a week since first signs. she is always hiding in the castle but does come out to eat. I tried feeding them peas. and cucumber, but they wouldn't eat it. any ideas? I have only been feeding this tank once a day since noticing and very little and some days not feeding them at all although it worries me so. PLEASE HELP!