I’d of algae or sponge

Ron Reefman · Jul 8, 2022

Really hard to tell from that photo. Have you tried touching it? Or scrape at it with something pointed (I use a dental pick). My best guess from the photo is a sponge, but then most black sponges don't like light and tend to grow under rocks. Is this new growth or could it be an old rock used in a new setup and this was the underside?

I’d of algae or sponge

steezreefing

New Member

Ron Reefman

Lets Go Snorkeling!

Similar threads

When to mix up fish meal: When was the last time you tried a different brand of food for your reef?

I regularly change the food that I feed to the tank.

I occasionally change the food that I feed to the tank.

I rarely change the food that I feed to the tank.

I never change the food that I feed to the tank.

Other.

New Posts