??? Not sure

[Rybo]

Noticed these things on my glass then these other things on almost everything. Any ideas
First pic is small spiral shapes that keep appearing on glass. Used scraper to get them off. Coming back slowly.
Second is what looks like lil tufts of something that like to cling to whatever they can. Can't tell if they are alive or algae or lil critters or what they are.

 

[Rybo]

Spirirbid worms and q tip sponges

After long hours of research I discovered what they are. Good filter feeders but I have a lot so I probably have a small nutrient problem maybe too many nitrates too. Going to do a full range of tests tomorrow and reduce feedings.

 

[carey]

I have those as well in all my tanks and have never had any issues with them. i would just leave them be, they wont hurt anything.