I have a lot of extra Rock. I have filled by 210 with this rock I shipped from CA (my dads tank) I think my tank now has too much and I can't fit it in. I'd like to trade for Corals. or $3.50/lb The rock was covered in Coraline and life but has been sitting in tubs in my basement for several months. I have done ocational water changes so it is not gross. I am thinking it is between 50 and 100lbs of rock.