Friend or foe, please help!

[Beetlejuice]

These have been popping up in my tank, and im not sure if they are something i should remove, or let thrive. Taking a look today the white maggot looking things are everywhere.... and the little green bubble is by itself, after removing one last week.
ideas, tips, ideas, warnings?
Thanks!

 

[carried]

The first 2 pics are pineapple sponges. Harmless filter feeders. Last one is bubble algae. When removing you want to make sure you don't pop it cause it will release spores then you will have more pop up. I take a small hose that has an angle cut and start siphoning the water, while using the end part to scrape the bubble at the base. Incase it pops the spores get sucked out too.

 

[carried]

The first 2 pics are pineapple sponges. Harmless filter feeders. Last one is bubble algae. When removing you want to make sure you don't pop it cause it will release spores then you will have more pop up. I take a small hose that has an angle cut and start siphoning the water, while using the end part to scrape the bubble at the base. Incase it pops the spores get sucked out too.

And when removing make sure to turn off pumps and blowers etc.