please help me identify some things on our live rock! and let me know if they are good or bad?

1. green looking plants growing from live rock?
2. small dark green ball. only one in tank so far. sits on live rock. not sure if it is attached or not.
3. red weed looking thing. hides when i touch it.
4. white stuff on several live rocks. its on top as well as bottom of rocks.
5. white weed looking thing. similar to 3 and hides when i touch it also.

thanks (:

Ok, the first two are bubble algae. Not bad but a nuisance. The type of algae in #1 is brighter than i have seen tho. Pull some out and squeeze it. If it pops with water, it's bubble algae. All you can really do is pull it by hand. You should probably get rid of it before it spreads. Toothbrushes work well too. #3 is an aiptasia. It is bad and you should kill it with kalk or some kind of remover like aiptasiax or joes juice. #4 looks like bleached coraline algae. It was probably under the sand for a while. #5 looks like a feather duster. They are good. They are a filter feeding invert.


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