I am planning on building a wet/dry 20 gallon long trickle filter sump for my 75 gallon tank. I will also be keeping the penguin 330 bio wheel filters on the tank also. My question is I want to install the overflow in back of the tree dirtwood, is that a good location or will the water flow be to restricted there? Also where does the return line have to be installed in the tank, is it fesable to have it next to the overflow?
