Any Ideas what these are?

another pic

here is a picture of one that i found on the glass

 

Those look like hydroids to me. Feathdusters have more "duster" look to them.. They look more like a fans whereas hydroids, have seperate tentacles. they looked more like a paintbrush.. they can have color.. the're photosynthetic. The both can retract.. hydroids you can see them retracting through the tubes usually. Feathers are lightning fast. Feather's also cave a calcium-like tube, usually white. Hydroids can be a brownish tube. Those medusas floating around in your tank is another stage of the hydroid, they won't survive. They should die out in time. I have taken the rock out, to pluck them of, burn them, or scrape em.. dip em.. and they can still come back, lol. looks like you have a green bubble algae in the 3rd pic.. time heals all.

 

I will get that bubble!!!!

 

here is a really good site people like to throw out when ID'ing multiple things -

Xtalreef

 

thanks everyone!!!