Hi everyone,
Ok not sure what is going on did a wc a couple of days ago all parameters are fine ph 6.0 and has been since tank was cycled all fish have acclimated to this ph. For wc left water out for 24 hrs to make sure and retested ph is definitely 6.0. I dechlorinate the water as always. Ammonia 0 although I did have a little spike a few weeks ago which I had done a wc think I might have been overfeeding and have cut back portions since then. Nitrite 0 nitrate 20.
I am really upset I lost a peppered cory last night unknown cause, my bosemani rainbow the day before unknown cause saw no disease whatsoever on either one no bloating no pineconing nothing! Now this morning I find my other bosemani swimming upside down he has this white fuzzy stuff on his body and fins and his fins are ragged
. I put him in a isolater for now but thinking I should QT.
I have Maracyn and Maracyn2 in the house and aquarium salt. I have the filter from my 2.5g QT tank in the 36g cannister ready to go. The QT is empty right now should I start it up with the filter and let it run for a little while or can I just fill it with dechlorinated water add the filter, salt and add the fish I really want to try to save this fish but not sure what to do. I am not good at diagnosing disease and have already lost my cory and bosemani the other fish are fine. Here are pics of him. PLEASE HELP!!!!!:help2:

Ok not sure what is going on did a wc a couple of days ago all parameters are fine ph 6.0 and has been since tank was cycled all fish have acclimated to this ph. For wc left water out for 24 hrs to make sure and retested ph is definitely 6.0. I dechlorinate the water as always. Ammonia 0 although I did have a little spike a few weeks ago which I had done a wc think I might have been overfeeding and have cut back portions since then. Nitrite 0 nitrate 20.
I am really upset I lost a peppered cory last night unknown cause, my bosemani rainbow the day before unknown cause saw no disease whatsoever on either one no bloating no pineconing nothing! Now this morning I find my other bosemani swimming upside down he has this white fuzzy stuff on his body and fins and his fins are ragged

I have Maracyn and Maracyn2 in the house and aquarium salt. I have the filter from my 2.5g QT tank in the 36g cannister ready to go. The QT is empty right now should I start it up with the filter and let it run for a little while or can I just fill it with dechlorinated water add the filter, salt and add the fish I really want to try to save this fish but not sure what to do. I am not good at diagnosing disease and have already lost my cory and bosemani the other fish are fine. Here are pics of him. PLEASE HELP!!!!!:help2:

