Tank bottom picture

[Myka]

Originally Posted by Drock169

I wonder why he has the outputs on the bottom rather than the back of the tank. Anyone know why? or have suggestions, I'm curious because my fiancee dad asked me to design a corner tank that is space limited.

I can't see the photos on that link, so I'm not sure if I'm answering this correctly, but I think I know what you're asking. Tanks are usually bottom drilled for overflows. Side drilling is usually for tanks with no overflows. Unless you mean the inputs are drilled on the bottom, in which case that is really just personal preference...some people like inputs on the bottom of the tank, others don't. Those who like it, like it because there's less filtering "waste effort" in the fact that if water is surface skimmed out of the tank, and returned down below, then there is more of a circular flow. If input and output are both near the top of the tank, then you will re-filter water that just came from the sump more than you would if it was output up and input down. Does that make sense? I don't like bottom returns simply because if you have a leak you have to tear down the whole tank. Side inputs allow you to just drain the tank down below them to repair. Same thing with outputs...they are either side drilled or use overflows, either way they can just be drained down a bit in order to repair.