I asked Eric about this in his forum because my problem is related to zoos (I think he is the zoo freak) but I didnt get a response so maybe you can help. I have 2 small rocks that have some zoos and mushrooms on. I fragd the zoos onto the second rock but there is what seems like slime algae on the original rock and it followed the frags to the new rock. I dont have much algae in the rest of the tank, but I think my cleaners do a good job at eating it all. I really only want to save the zoos on the 2 rocks, I have all ready fragd the shrooms and the algae didnt follow them. I have tried removing the algae and scrubbing it clean but it seems to come back after a while. So can I scrub the rocks and then try to starve the remaining algae of either light, oxygen or even water? and then rinse the rock again and hopefully wash off the remaining dead algae? I dont know who could last longer without light or oxygen, zoos or algae but I dont want the algae to spread. I was thinking either put the rocks in a dark box for a day or 2 w/ or w/o water and hopefully it would die but leave the zoos behind. I hope this makes sense and thanks for your help.