I have to say, yes.

Can you aerate, or are you aerating? I had a similar situation but had a heavy rain that may have caused a turnover. None the less, we had a fish kill. We were not aerating as we didn't think we needed it.


Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."