Ok, so what I was trying to get at is if the dosing was due to an algae outbreak and whether the dosing had just started and algae started to die. Lots of algae, low ph, higher temp (my apt reached 30C last week), decaying matter all consume oxygen at night and was looking to see if the timing lined up with the deaths on the 7th day.
To be clear, I'm not saying people can't have skimmerless successful tanks with angels. Tanks can be aerated by means other than skimmers. That just means those skimmerless tanks didn't have hypoxic conditions. It doesn't mean other people's tanks don't have hypoxic conditions for some demanding fish on a bad day.
Anyhow, I know I'm beating a dead horse and have not been convincing enough. Maybe I'll have more to add when I get a chance to do some experiments on my own tank and intentionally lower my DO in a controlled way to see how my fish will react. Anyone know any biology students at UBC with access to a respirometer that want to do some research on reef fish hypoxia?
Last edited by Samw; 04-26-2015 at 07:50 AM.
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