Originally Posted by AbbeysDad
Lowering the temperature control on your heater is a bad idea. If the tank temperature is higher than the heater set point do to the weather/room temperature, the heater simply does not come on. But now you've set it lower so when the temperature does come down, your tank temperature will now be too low. Opening the lid(s) and/or having a fan blow across the surface are good ideas - fiddling with the heater setting, not so much.
I only lowered the temp gauge on the heater to still above the minimum temp range for all the fish I stock. Usually run the tank about 25c, yesterday the tank was around 27 and I dropped the thermostat to around 22-23c although now you have pointed out that it is pointless I have increased it again.
The fish don't seem overly bothered by the weather, I think the odd behaviour I noticed may be some kind of spawning behaviour. Just never noticed it before in the glow lights. The danios I have were definitely doing the same thing the other day, and when I changed the floss filter pads there was eggs stuck to it. must be the weather, or the time of the year maybe? I know nothing about fish reproduction.....
cheers for the advice though