[serotonin]

#1 died about 2 months ago, #2 died about 2 weeks ago, #3 is showing latter stage signs now, #4 looks healthy. (yes i had 4 originally)

I swear I am about to go insane. I cannot figure this disease/illness out but its ravaging my clowns. I've talked with ppl at the LFS and they are clueless. I've also made a post previously without much luck.

Symptoms:
-a white filmy/cottonish looking glaze covering the clown(s)
-when the film covers most of the body the fish will prefer to spend its time in a high current area, oxygen depletion I'm guessing is the cause of this. Pretty confident the filmy stuff is getting to the gills then.
-respiration is up but not at an extreme, again pointing to respiratory problems.
-eating habits are aggressive as usual
-later stages the rear fin will become very whitish and red(inflamed)
-the rear fin will likely fall off within 24 hours of 1st sign of the whitish tail. I think its more likely to be from the stress than the illness, but don't quote me. This has a distinct vertical line between the whitish fin and the body.
-once the tail falls off the fish will likely pass withing 24-48 hours

My water parameters are great as far as know.
-0ppm nitrates, nitrite, ammonia.
-pH, hardness are all in check but i don't recall the exact values
-water changes range from 10-30% every week

Action taken previously was
fish #1, no action taken he croaked in the tank
fish #2, put in QT to see if a less stressful environment would help. Also treated for body fungus as that was the diagnosis then.
fish #3 is in QT as of this morning with cuppramine dosed to 25ppm and will increase to 40ppm if there is any sign of improvement.

My guess is brooklynella is causing this(hence the copper). It's hard to say though, the fish won't hover at the top or bottom, eating habits are good. But the whitish film and the high-current swimming habits make me say yes. Doubt its velvet, it doesn't progress fast enough. Certainly not ich. Body fungus is likely no b/c water prams are great and treatment for fish #2 didn't help any.

PLEASE PLEASE don't hesitate to post your ideas, I don't claim to be a pro! Shoot down my thoughts, call me crazy, I don't care. I need some help here my fish are dying and I'm not having much luck in saving them.

Thanks all!