|Re: Losing corydoras :-(|
Subject: Re: Losing corydoras :-(
by Fishlady on 2018/10/20 15:40:05
There's nothing obvious from what you've said, except that 0 nitrate rings alarm bells. As the final product of the cycle, it's almost impossible to have 0 nitrates in a stocked tank. That may indicate that the cycle failed recently and produced ammonia and/or nitrite spike which killed the fish.