Hi I was using 2 20 gallon aqs and I absolutely hated it! keeping the temps was a pain because the heat kept escaping and hum wasnt stable. So to get by I used the foil trick I placed a two deep wet towel under the foil to help keep in hum. I also switch from aspen to forest moss mixed with coco bark this helped keep my hum manageable. as far as heat I used a uta but never got a themo until I build my heat rack. This all I went through with glass tank meant for fish. I served its purpose but as soon as I found out about tubs I made the move asap now my greatest issue with my bps is who should eat first. I sa all that to say this it was a constant battle to keep the tank right make sure u use themometers and hydrometers to watch ur temps and hum GL