Can anyone plz help me ID these? these are two separate tanks

[brightonjg]

Can anyone plz help me ID these? these are two separate tanks. Ugh I just finally got rid of nearly all of the vermitid snails and digitate hydroids and now I have to deal with this

 

[ISpeakForTheSeas]

The first pic is sponges - harmless filter feeders.

I can’t tell on the second and third pics.

 

[WheatToast]

Can anyone plz help me ID these? these are two separate tanks. Ugh I just finally got rid of nearly all of the vermitid snails and digitate hydroids and now I have to deal with this

1. is sponges. Harmless filter-feeders.
2. green coralline algae, which usually appears before pink coralline. The white portion is dead while the green portion is alive.
3. not sure about this one. Might just be detritus.