By lowering the water level in the pump compartment I have exposed more glass surface to the "waterfall" effect. This was done after I noticed that a few species of filament algae only grows on the interior of my overflow boxes. Once a week, I simply take a single edged razor blade and clean alternating "stripes" and throw it away. Doing so is a good way to export all the nutrients such fast growing algae uses and sequesters.
Basic Sump Design
A Usual Sump Set Up
Note: Any of these setups can use drilled tanks for overflows instead of the usual overflow boxes as well as using external pumps instead of submersable types.
A Sump with Side Refugium
This design is well suited for growing mangroves in the refuge to allow for overhead room as well as to provide for a low flow environment for more delicate creatures.
Above Tank Refugium
This design is meant to allow live food to enter the main tank without having to go through a pump's impellors
Sump & Refugium Combination
This design is well suited for growing mangroves in the refuge to allow for overhead room or for equipment that is too tall to fit under the main tank in the sump.
Used by permission. Many thanks to Charlies and Linda Raabe for their support. www.chucksaddiction.com