couple of questions on some growths, are they corals?

[patti w]

the first one is set near the BTA, and there may be another close by. its firm but not too soft. grows slow..what is it?
this one is on the mushrooms, also not soft but not really hard. is it just part of the mushroom rock?

and finally a leather like looking thing growing also near the BTA.

 

[bang guy]

Those all look like sponges.

 

[patti w]

good or bad ? lol. i love my mushrooms and if the sponges are going to affect them, ill try and get it off the rock

 

[bang guy]

If the sponges were annoying the Mushrooms then they would be attacking. I see no reason to do anything.