Join Date: Mar 2012
Location: Montreal, Canada
Acceptable nightly temperature swing
So I've not yet installed a heater in my aquarium considering how stable it's been all summer (hasn't moved at all from 25 Celsius, no matter how hot it got outside), but now that falls coming I've noticed a shift of about 3 degrees Celsius each night (from 77F to 71.6F, according to Google).
I've been told that in nature, the fish and what not would undergo a normal and natural overnight temperature variation, but is what's going on in my tank too big a swing for the inhabitants? Should I pop in the heater now to just try and stabilize it?