About a month ago upgraded from a 10 gallon to a 30 gallon. A week after the fish were transferred and all seemed well we went and bought 2 angelfish, another loach, and a bala shark. The original occupants are 2 platies, 2 small Plecos, a little catfish, and a loach. Oh and 3 tetras. A couple days after we noticed the angelfish had a fungus so we treated the whole tank with fungus cure twice and that went away. Right away noticed ich on one of the angelfish and spread rapidly to almost all the fish. Started treating right away with rid ich, and slowly raised the temp. Every day when I thought it was better the next day it would be worse again. So I was adding ich cure plus had the temp raised (I know not supposed to do that but wasn't getting anywhere!) so now they still all have a couple spots and now the angel fish that has been causing problems all along seems to maybe have another kind of fungus- a thin cottony film all over him that kind of sloughs away. Pic included. So now I'm like oh great... None of the other fish have that but they all look a bit sad, maybe decreased 02? Have bubbler going. Don't know what to do! Keep treating ich? Use a fungus cure? ( little catfish didn't like that almost died) can't quarantine. Water quality good and doing 20% water changes every 1-2 days. Please help!