Need some advice**

[newbiemarine]

Hi, I need some advice please. I just see something green build up under GSP base. Is it safe or should I remove it ? Thanks.

 

[Tahoe61]

Looks like a cool sponge. Awesome coloration.

 

[newbiemarine]

Looks like a cool sponge. Awesome coloration.

It’s spreading to the rock. Should I remove it?

 

[Tahoe61]

If it were my tank I would not remove it. It has been my experience that most sponges are self limiting. I would just wait and watch for now.

 

[AydenLincoln]

I agree on sponge! I would say that is a score!