I built my first fish tank in many many years last month with the help of one of my friends who is an active user on here and a huge fish enthusiast. This week I put my first set of fish in and am trying to chase down and overheating problem that I've been noticing my fish are not too happy about.
The tank I'm talking about is in my signature, but I will give you a brief overview. My main focus was Hillstream Loaches because I think they are really cool looking fish, so I build a filtration system to give them a current while not being too visible in the tank. I have an Accela SP1-600 182gph powerhead hooked up to some PVC that runs under the gravel to the other side of the tank and is hooked up to a sponge filter.
The tank is 10 gallons and has a Coralife Dual H.O. T5 light sitting up top.
The issue I am having right now is that the Hillstream Loaches don't seem very happy and I know it is due to the fact that the water is too warm for them. The temp is currently sitting at about 78-80F but I can't figure out what is making the temp so high. I do not know if it is the light or the powerhead causing the water to be so warm as there is no heater in the tank.
The light is only on for about 8-10 hours a day, and right after the light turned on this morning I checked the temp and it was near 80 still, which is making me feel like it is the power head. The tank is covered, so I'm not sure how much of the heat that is holding in, but currently my powerhead filtration system is turned off and I have an air powered filtration system in the tank to see if the temps drop with the powerhead off.
Does anyone have any ideas on how to keep the tank cool enough for the loaches, or what may be causing the warmth? I'd like a powerhead since these Hillstream Loaches like a current in their habitat, but I'm not sure if there are some powerheads that run cooler than others, if that is even the problem.