Corner Overflow

[mutiger91]

Just picked up a rimless 60g cube. Once I got it home I realized the 2 holes drilled are both for 3/4 inch bulkheads. I would have thought one should be 1 inch or 1 1/4 inch for the drain. How would i plumb this (worried about overflowing the drain)? Is it possible to re-drill the 3/4 to an inch? Suggestions on how to set this up best.

Thanks in advance.

 

[Bruce51]

I would use them both as drains, 1 full siphon and the other as a emergency, and go over the top for return

 

[Vinny Kreyling]

Herbie Drain System
https://gmacreef.com/herbie-overflow-reef-tank-plumbing-method-basics/

Do NOT try enlarging the hole, chances are the bottom glass is tempered.

 

[Krchfam]

+1 Herbie


Sent from my iPhone using Tapatalk

 

[Fragmented 99]

Need to silence a 250 reef ready with 2 corner overflows. Currently running a durso and return in each overflow. Wondering if So can convert one overflow to s Herbie overflow . Thinking the other overflow (durso,) could act as the emergency drain should the Herbie fail. Any issues with doing this?

 

[mann1139]

PVC is cheap. Why not just adapt to the larger hole, and then back down?

If you buy an overflow kit, but beware that the return bulkhead will not fit.