What are these white things?

[Mike7744]

I have these white things growing in my sump. On the glass, does anyone know what they are?

 

[tbrown]

Pineapple sponges. They're good filter feeders that are usually an indication of a healthy new tank. They'll self regulate and will eventually mostly go away.

 

[Mike7744]

Pineapple sponges. They're good filter feeders that are usually an indication of a healthy new tank. They'll self regulate and will eventually mostly go away.

Thanks