I have a 40 gallon breeder stocked with 6 tiger barbs, 4 keyhole cichlids, a bristle-nose pleco and a RTBS. The tank has a half sand half flourite substrate, large piece of driftwood in center, surrounded by rock caves, planted with light CO2
injection (1 drop per 1.5 sec). Tank has a glass top, lighting is a dual tube TH50 timer controlled to turn on a 9 am and off at 7 pm.
My problem is temperature control. Here in the Northeast, the temps are now over 90, and that sends my tank to 81 degrees and likely higher if I were not doing near daily PWCs. I changed just about 80% of the water yesterday, bringing the temp down to 76%, but today it's back to 81 degrees.
Any suggestions? The glass top is for the RTSB. Maybe a mesh top? Take one of the tubes out of the light fixture? Less time for light? I'm not in the mood to buy a $500+ chiller so any help would be greatly appreciated.