reeferdude
Member
I was looking through an aquarium hardware catalog I just got and I saw a very kool looking thing called a refugium. This one hangs on the side of the tank and has its own powerhead to move water, best of all its only $99.99. My question is what is a refugium used for. The caption says it is for fish isolation but it also has a lot of algae in the picture so I don’t really know..