I did a thread on this, but since this is for ID's I thought I would ask what this could be. The reddish stuff is slimey and is cyano from what I have gotten for a response. The trickey part is what the little green fern like things are growing out of the cyano. I had bryopsis on a piece of rock but manually removed it from the rock and rinsed in three different buckets before being placed in the 46 gallon tank where I have this powerhead. The stuff is only growing on the powerhead and no where else.