Black sponge REEF2REEF Saltwater and Reef Aquarium Forum

I've been told this is black sponge. Do I remove it? Will it spread?

Is this a sponge of some sort? I haven't added anything to my tank

Black sponges? REEF2REEF Saltwater and Reef Aquarium Forum

What is this black looking sponge like stuff In my reef tank

Sponge? REEF2REEF Saltwater and Reef Aquarium Forum

Black algae??? Need help! REEF2REEF Saltwater and Reef Aquarium

Acan disease? REEF2REEF Saltwater and Reef Aquarium Forum

Encrusting sponge REEF2REEF Saltwater and Reef Aquarium Forum

What is this black hitchhikera sponge?

Sponge crab sponge falling apart?

Is this sponge good or bad?? REEF2REEF Saltwater and Reef

Sponge ID? REEF2REEF Saltwater and Reef Aquarium Forum

Sponge and Sea squirt and mystery softie question

Black sponge REEF2REEF Saltwater and Reef Aquarium Forum

Light black sponge REEF2REEF Saltwater and Reef Aquarium Forum