Don't mean to derail, but the water leaked down into the neighbor's apartment.....Luckily it didn't do any serious damage..
Dude that is brutal. Sorry
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Don't mean to derail, but the water leaked down into the neighbor's apartment.....Luckily it didn't do any serious damage..
Do you inject CO2 into the tank?
what floating plants do you have? I am having good luck with dwarf water lettuce because they have a large root system


I was thinking the co2 buildup at night caused them to gasp then jump. You said you pump o2 at night though, so now I am unsure...
It could have been a dump of your CO2. I've had that happen before. Over 2 days several fish jumped. Found out later that the CO2 tank was near empty and the tank had dumped. O2 and CO2 exist separately, so even if you have lots of O2, the fish can still be suffering from CO2 poisoning.