I think I fed my fish a bit too hard before the biofilter had a chance to come up to full capacity and stressed my fish with nitrites and ammonia (not sure because I was too cheap to buy the test kits). I see some products out there (antifungals) that look like they'd work but the local place around here is crazy expensive to buy some treatment.

I am doing a lot of water changes now to try to reduce the stress on the fish and hopefully stem the spread of the disease.

Does anyone know of an on-line seller of the sort of antifungal that will cure the dreaded fin rot? Do you treat by the gallon of water in the tank? I have about 1800 gallons and the person at the store I was talking about said I'd probably have to treat 2-3 times to be sure I got it all cleaned up.

Thanks in advance,

Wes