I brought home a small rock with maybe three to four green blue metalic mushrooms on it (very cool color). My lfs told me to place them about half way up in my tank, and near (not directly in) one of my powerhead outflow. I was told if they were happy, they would grow in the diection the water was flowing. They were right I must have close to thirty now. I have never actualy watched them seperate/reproduce but they seem to be doing it well. they have taken over several lr next to them ( all down flow )btw for my 50 gallon I use VHO lights one four foot actinic white and one four foot super actinic. I add Calcium, Iodine, Strontium and Molybdenum almost daily. Hope some of this helps.