Once I got myself a powerhead to circulate the water. I didnt get that problem anymore plus got 3 plecos doing algae grazing.Anthraxx said:im going to caution you guys, if you allow excess nitrates to build up or have excess food you will sooner or later battle it out with diatom algae blooms. if you dont keep up on keeping this stuff clean it will get everywhere. just thought id caution as it seems i am now fighting it all over again in my 20g (third time doing a complete change cuz i cant stand it)