Red Fuzzy Algae?

[Hound]

ok ive had red slime algae but this stuff is fuzzy and is growing on rocks and conchs.....its red and has random patchs of bright green fuzzy algae. The fish are always picking at it but it never seems to die back. I tried to scrape it off and no luck this stuff is on there....anyone else have this stuff and is it ok? Id rather have back the purple coraline .........

 

[spoon25]

it goes away after all nutrients from the water are gone and when the tank is fully cycled...its starting to go away in my tank, was there for 3 months cyclying...the stuff is nasty it covers up corals and everything...but it does get hard like corraline and it either turns green and dies or it just peels off..but under this stuff the rocks look really good....and the coraline looks even better