120 tall, 40g sump home made which i'm having microbubble problems with. any advice welcome, but my real concern right now is this red stringy stuff growing all over the tank???? two 250w mh and 4 t5s' for lighting. my levels are good ph is 8.1 calcium is up amonia 0, nitrite virtualy 0. some of this stuff is 3 or four inches long and it seems the microbubbles are atracted to this stuff looks like little balloons all over the tank.