what is this ??

[ffsteve]

not quite sure if it's a sponge or a virus? you thoughts

 

[JohnK]

sponge

 

[Owen386]

sponge

 

[ffsteve]

thanks just worried about the color.

 

[stingythingy45]

Yeah,it is an odd color for sponge.
Most of mine are white,yellow or had one that was a very light purple.

 

[Turbosnail]

Mine started green and turned bright yellow when it got bigger.

 

[planereefer]

I agree with everyone that its a sponge. I have a black sponge in my tank, they come in sorts of colors