Closed Loop Help

[ronnieblaze]

So i want to put a closed loop on my new 75g tank.. its all acrylic so ill have no problems drilling it..

I would like to have 2 returns in the front bottom corners and also have 2 on the back wall..

what size should the return bulkheads and and the drain bulkhead?

 

[xyzpdq0121]

I would Do your returns in 1/2" and your intake (2 of them) in 1".

FYI: front bottom corners are not the BEST place to put a return. Heck, on the bottom is not the best idea anyways. Too much water column to push up on for most returns.