I have these really ugly zoos all over my tank. They are out of control. I want them out but manual removal is really not an option. So I figure I will take out any zoos that I like (1 small colony) and put it in another tank. Then introduce the pest zoos to my little friend. Once they're gone I'll wait a couple of months and reintroduce the nice zoos. Any one have any that the would like to get rid of?