lethal parameters.. but fish are still alive.
so today i found my blue tang dead at the bottom of the tank. he had ich for the past 2 weeks. i tested the water this morning after i took him out. ...
ph went down to 7.8-8.0
ammo went to .25
nitrite went to 5.0
nitrate at 80
i thought having nitrate that high would be lethal. should i do a water change? .. they seem to be doing fine. swimming and eating. i just want to get some advice before i do a water change.