• Help to identify! It looks like yellow cotton.

  • James4342

Hello, marine aquarium enthusiasts! There has been a sudden increase in some growths throughout the aquarium that look like dense yellow cotton (in the photo). The corals have closed up, and the fish are not doing well. What could this be?

Sherri1320

It looks like some kind of sponge. It's hard to see.

Karen

Did you add anything to the aquarium? Like vodka to fight nitrates?