weatherson
Premium Member
clekchau, The refugium is a 20-gallon tank I made with a single, corner diagonal overflow "box". It is feed tank water at a slow rate via an outlet of the main circulation pump and drains its outlet water back to the sump. It is lighted with a single end, 150-watt 6500 Kelvin MH bulb driven by an IceCap electronic ballast. This light is on a reverse photo period to the main tank lights. This also helps to stabilize the tank water pH throughout the night. I grow and harvest regularly Chaetomorph macro algae. Here's an older shot of it taken prior to having removed the OM Squirt 4-way and its associated plumbing. The current plumbing simply directs the inlet water to the lower-right area of the tank, furthest from the over-flow box at the left-rear.
Joseph.

Joseph.