In my case, it was reproducible. Flame angel a couple of times. Lemonpeel angel one time. Cherub another time. Always established for many months or years. Always after skimmer off overnight. Never a problem otherwise. If I had to guess, my DO level would have been around 20% (maybe much less. Eric's clownfish tank experiment had DO levels of 15%) without a skimmer running at night with a tank with algae.
Not saying this can be the only reason for mysterious death. But it is overlooked.
By the way, what was the reason for H2O2 dosing? To deal with an algae problem?
Last edited by Samw; 04-26-2015 at 04:19 AM.
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