I'm wondering if I can use some crushed coral that has been removed from a tank for about 6 months? It will be going in a stand alone refugium and I was (am) concerned about spiking Ammonia, Nitrite and P.H.. I will be putting new salt water in the 'fuge and do have the ability to restrict or prevent water flow in case a cycling is needed. The system volume is 85gal. before the 'fuge for informational purposes. Is there anything I should do to the c.c., short of throwing it away unless that's all I can do, that would help? Thanks, Ken