Hello, I am setting up my tank with sand like many here have suggested. I had c.c. in the tank and before I came on this forum and read several post about the c.c. had plans on using the c.c. mixed in with new sand but have since set up with sand only. I have a 150 gallon main tank with a 50 gallon refugium, my question is can I use the c.c. in the refugium or will this still create a problem for the main tank. Thanks in advance for any input here.
