I have just bought a new 6ft tank which I intend on using to keep cichlids but it came with a sump which is full of live rock rubble. The rubble was still covered with tank water but hasn't had pumps or heaters running on it for a couple of weeks. Will it still be any good and does anyone here want it? collection only I'm afraid! Would love to set tank up as marine but can't afford such a big set up - live rock, skimmers, lights etc Also can anyone tell me how to clean all the red crusty stuff off, I assume I need to get rid of it all before I can use tank for freshwater fish


