Hi, so for my next dumb question I want to ask what is the preferred temperature for peppered corys? I've read 20-23C, which I think is 68-74F... does that seem right for peppereds? #2 - I lowered my heater based on this (they had been living at 76F before I knew they like it colder.) Unfortunately, it is summer here and due to ambient temperature the tank is up to 79.4F. Is this dangerous for them? It usually hasn't been that high, so I don't have any cooling mechanism. Advice?