Originally Posted by rhomb
Are you sure the red one is slime algae?
it was there when i bought the live rock and during my cycle... i thought it was only cool coraline
The purple rock off to the right in the first pic is definately coralline but the larger portion of the rock does look as though it could be either cyano
or possible a form of velvety coralline. Easiest way to determine it as two11devan
said is get a turkey baster and try to "blow" it off the rock. If it stays put, it's most likley not cyano
The second pic is very hard to make out but it could be a type of turf
or similar. Can you post a better pic?