Algae/Sea Weed ID Please

[bluetang]

Does any one know what the green sponge like algea is and what the redish tumble weed looking algea or sea weed is? Is it a nuisance algea and will it get out of control?
http://groups.msn.com/_Secure/0RwDVAsgU9ND1cd8k5!cyumj*A8AP4a1L1FfXJiKFnNGa6RIKs 9AMM81Yk4lvsg*2DJ79i5YgYrRp6hUyZw5cOyV3AkyZFNu1YXt My3kXX9E/P1010003.jpg?dc=4675482405477346845

[Delphinus]

The tumbleweed might be gracillaria espescially if it's a free floating clump... no idea about the green one though.

[christyf5]

I have the green one too, is it bladed/leafy? I can't tell from the pic. If it is, I believe its called Turtleweed.

Christy :)

[bluetang]

The green stuff is more like a very dense sponge.