I really feel for you. We had a bacterial infection which wiped out about 30 of our fish, then we got a fungal infection straight after which killed off another 20, then we restocked and have now got whitespot. I have been keeping fish for years and had a 4 foot and never had any infections then i thought i would be kind and upgrade to a 6ft as i had bala sharks and since i upgraded ive had all these infections, its heart breaking losing all your fish. My severum is suffering bad with whitespot at the moment, i am also treating with protozin, on day 3, so fingers crossed. Wilder seems to have a lot of knowledge on infections and has helped me immensley. I really hope the rest of your fish make it.