It's me again...One quicky. From what I have read from the forum, as well as surfing the web, I understand that a few factors support diatoms and their survival and now I'm trying conduct the eliminating process one by one. My question is this...Will diatoms survive in an aquarium with very little light as well as an aquarium with sufficient lighting ( eg. in my case, 40 watts in a 90 gallon now as opposed to 260 watts in a 90 gallon hopefully tomorrow)? Also, should I rinse off as much of the diatoms settled on my rock (in aged tank water) as possible when adding my new power compact flourescence or should I just leave it all there and see if it dies off...This brown nuisance is driving me CRAZY!!!!! HELP!!!!!!!!!!!!