my 180 gallon tank has two corner overflows...When you look at them from the outside , it looks like something from the movie aliens..i mean there are hundreads of pods, bugs, all kinds of things swimming around as well as all these things growing all over the pvc pipes and walls. the overflows get light all day because my actnics are over them so when the lights are on they are getting a normal lighting period. Anyway would my overflow, the way they are be considered kinda of like a fuge? are the explosion of pods and stuff due to the slow water flow and it not being disturbed? Should i add anything to to help out? LIke the green stringy algea (cheato (sp?) i think its called)...i mean has anyone turned their overflows into a fuge? or is that crazy? sorry for the newbie questions...lol..