my tank is 4 weeks old and seems to be cycled and ready to go. everything is testing within range. i have already put some scarlet hermits and some turbo snails in the tank to help control unwanted algae. there is some green feathery looking algae about an inch long starting to show up(hope its not bryopsis) and some bright red algae on a few pieces of my L.R. and is beginning to spread quickly. dont think its red slime algae because i tried to clean some of it off a piece of L.R. with a nylon brush but could not remove it completly. almost like it stained the rock??? does anybody have any ideas of what kinds of algae these are and are they a good addition to a reef tank???