White blobs

[Twen17]

Can somebody identify these white blobs in these pictures?
My tank is about 6 months old. These are in the overflow box. Not really anywhere else in the tank beside the box and the glass around it.

My phosphate is normally a little high, between .8 and .2 ppm on Hannah checker. (Not intentionally)

I have 1 turbo snail. I have read that they don’t lay eggs but maybe these are related to the snail?
Fish are blenny, clown and dottyback.

 

[hds4216]

Do you have any pictures with white light instead of blue?

 

[Gtinnel]

I can't tell from the pictures but from the description look up pineapple sponge and see if that matches what you have.

 

[Twen17]

Do you have any pictures with white light instead of blue?

Struggling to get a good focus but here is with white lights.

 

[Gtinnel]

Yep pineapple sponges. They're very common in newer tanks and don't cause any problems.