Ok, folks I'm going out on a limb here to show just how ignorant I am. I'm still rather new to the hobby and there's some stuff going on in my little 10 gallon I'm not sure about. I have some things growing I'm hoping I can get some help identifying:






Any ideas on the name/species of this macro algae? Why is #1 pure white and #2 very green? #1 started out green, grew to its present size and faded to white.






I'm guessing #3 is some sort of bristle worm. I've got bunches of them. I'm guessing there's a predatory relationship with the copepods. Would I be correct on either account?

Any idea what the name/species is for #4? Im loaded with this too. Seems to grow like crazy. Good/bad?






I've got some polyps and I'm thinking #5 is some sort of nudi that likes to hang out on them. There's a few of them, although I would say they aren't a problem... yet. Anyone know what these are and should I be concerned?

Thanks in advance,

Mark