Help clownfish sick?

Neno reefs

Reefing newb
Both of my clownfish were doing good yesterday, then i did a WC only 5g and the tank is 35g. 3 hours after the WC one fish was MIA and the other was sitting in the corner. Then this morning i find the one clown DEAD:death: and the other swimming around. The one live fish isn't eating and breathing heavily.
Salt is at 1026
Nitrates:0
nitrites0
ammonia0
PH 8.0

What could be wrong?!? I messed with the powerhead and skimmer yesterday, maybie he was shocked? Can you do a WC wrong? it was the same temp(78) as the main tank was and the same salt.
 
12 days,

He has a long white stringy poo for a day now and some where i saw thats a sign of a parasite. so i think i will QT and treat with prazipro
 
Don't pull him out to treat, it'll just stress him more. Prazipro is safe to treat right in your DT.
 
flush it? save money and trouble ? :)


Yes, I know, I am a monster... I was raised in Soviet Union, blame F. Russia :D
 
Well i did put him in QT and treated with prazi pro. I didn't treat in the main tank because i have some little worms in there i didn't want to die.
 
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