smoothlarryhughes
New member
Pretty much spot on. My tank will be in my living room, so I'm aiming for silence. A herbie drain with a dc return pump and mp40qwd's, that's my plan. You can run a herbie with the two holes, but using a 1/2 for a main drain on anything over 75g is asking for trouble.
I'm getting the 90 gallon cube. If I wanted to run Herbie, would I want to increase the 1/2 hole to 3/4, and use that as the drain and the 1" as the emergency? What size would I make the return (plumb over the top)?