| Hmm, the green could indeed be coraline. I have some green coraline that comes ad goes. if it has the same growth habit and texture as the purple coraline, then that's probably it.
I have a little of the red velvety algae as well. My mexcan turbos love it. It's never progressed to the point of being a problem, so i haven't really tried all that hard to get rid of it.
It sounds like your bulbs are nearing the end of their useful lives though, and you might want to replace them sooner rather than later.
__________________   | 
