Please can anyone shed some light on what I can only describe as cotton wool, with black dots in it, I noticed them this morning under some live rock, nothing seems to be moveing in them and am not sure how long its been there. They are about the size of two five pence pieces next to each other. Do I remove it, or leave alone and see what developes. We've no mateing pairs in the tank. I've tried to take a photo but cant get it clear enough to make out detail.

__________________
Ex divers do it deeper

without some sort of picture , cant be sure what it is sid , but its not some old rotten fungusy food is it or dead fungusy critter either way if you are sure that nothing is breeding, I would syphon it out, and have a closer look , (you can always put it back in )

__________________










senile old git

Thanks mate, I'll maybe try and get a better picture before I disturb it

__________________
Ex divers do it deeper

Sounds like a sponge to me. Always get white sponge growing in amongest the rocks in the dark.

__________________
8' x 2' x 2' - Piece of Ocean.
6' x 2' x 18" - Wild Caught Zaire 'Moba' Frontosa
4' x 2' x 20" - Malawi
4' x 22" x 18" - Malawi + Victoria
4' x 18" x 18" - Breeding Cuban Cichlids.
Trigon 190 - Male Paratilapia Polleni
20" x 20" x 20" - Marine
30" x 1' x 1' - Hospital Tank
2' x 1' x 1' - Tropical

and

7x - 1' and 2' cichlid fry tanks