My Nano Cube's changing temp

[triciod]

Through out anyone day my 24 gal nano cube will have a changing temperature from 79 degrees (lights off) to almost 84 degrees(lights on). Is this normal for a nano cube? Is this problematic at all? What should be done here?

 

[Agu]

84 is a bit high and doesn't leave room for any margin of error. Here's how a friend added a cooling fan to a 12 gallon nano cube,

Fan


You'll have to scroll down to the pics......

 

[noschmo]

Heating issues are a major problem for all small tank owners and this issue has been discussed literally hundreds of times on different threads with many suggestions, some viable, some not. The best approach, albeit, an expensive one, is a chiller. For small nano tanks, nanocustoms.com sells a small chiller for nano tanks that does a good job of keeing temps stable. Fans are helpful but evaporation increases significantly and that means leaving the top up.