Fishkeeping411
Aquarium Advice Apprentice
So my acrylic 7.5 gallon tank has a sump built into the back of it & my heater never heats the tank when it is in the sump, but as soon as I put it into display area it's fine. I have it in there right now but it makes the tank look kinda ugly. I'm not sure why this is happening. The flow rate is fine. Somebody suggested that the acrylic might have something to do with it.
Can anyone help?
Can anyone help?