lethal parameters.. but fish are still alive.

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jsa83

Aquarium Advice Apprentice
Joined
Nov 16, 2010
Messages
40
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.
 
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.
nitrate can be pretty high before death,id be more worried about the nitrite
 
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