Help, can't figure this out

[Coleus]

Originally Posted by bauder1986

Yah i would put a ball valve into the return line and get that drain line that runs all wonky there fixed so it doesnt get all air locked.....and try not to get out of the hobby too quick haha.

what do i have to do so that the air does not get trapped? Make sure the water does not travel upward for return line?

Well, I don't want to get out of this hobby but thinking of shutting down this tank. It causes me so much grief from beginning