|
I'm not sure how low you can go without problems, but one concern I'd have with pushing the boundries would be how long your tank could last is power was lost. Lets say 70F is the lowest you can go. If you keep your tank at 78F and lose power, your tank can drop 8 degrees before issues relating to temperature start. If your tank is already at 70F to start, than you'll notice issues very quickly when the power eventually goes out.
If looking to save money, you could look into insulating any part of the tank that isn't for viewing. You can get foam sheets made for insulating house walls and cut it to size, then tape or add a bit of glue and stick it to the back, and maybe a side or two of your display, and all 4 sides of your sump.
Actually, looking at your setup, it looks like you have a multiple tank system, which means you do have a lot of surface area for heatloss.
|