I’m a fan of the Modular Marine overflows. I have their 1200 gph overflow, upgraded from their stock 3/4” drains to 1” drains. It’s installed on my Deep Blue 57 rimless (36x18x20), same footprint as a 40 breeder, but 4” taller. Because I’m using a Trigger 26 sump, which is very limited in space, I’ve capped off one of the drains and am using the overflow as a 2 drain Herbie set up. It runs silently. Here are some photos for reference.
Drilled tank with dual 1/2” returns...
Holes taped off accounting for the gaskets so I can paint the back of the tank and maintain a clean gasket seal with unpainted glass. Note that the gaskets for the overflow sit on the exterior of the tank while the baskets for the returns sit on the interior of the tank on the bulkhead flanges...
Here are a couple of shots of the overflow installed along with the dual RFG (random flow generator) return nozzles. Love the low profile look of the ghost style overflows...
Here is a look at the primary and secondary drains of the Herbie set up going into my Trigger 26 sump...
Hope this helps!
Drilled tank with dual 1/2” returns...
Holes taped off accounting for the gaskets so I can paint the back of the tank and maintain a clean gasket seal with unpainted glass. Note that the gaskets for the overflow sit on the exterior of the tank while the baskets for the returns sit on the interior of the tank on the bulkhead flanges...
Here are a couple of shots of the overflow installed along with the dual RFG (random flow generator) return nozzles. Love the low profile look of the ghost style overflows...
Here is a look at the primary and secondary drains of the Herbie set up going into my Trigger 26 sump...
Hope this helps!







