In my opinion this underscores the importance of bottom-diffused aeration, and not simply as a means to infuse additional O2 into the water column, but to ensure adequate mixing of the BOW in question. As you have unfortunately discovered, low O2 isn't the only thing we need to worry about.
I think it's possible to have adequate O2 for a BOW, and still poison the fish during a turnover. There's more to it than adding air.
Last edited by sprkplug; 06/17/15 08:10 PM.
