ok here it goes ....the only algea i kow the name for is detrius and hair algea. i really have no problems with detrius but i have a very light lime green grwoing on the top most rocks of my 37 talll... tookum out scrubbed um. it was t=back a week later. then i have a very then filament of brown on the bottom 3rd of my tank . but the very middle of it(the tank) is fine.. what to do....? please comment