I bought a saltwater fish tank from a guy about 5 months ago. He had about 80 lbs of live rock in it and also live sand. I really had no place for it yet, so we just put the rock and sand in a few 5 gallon buckets, filled them with saltwater from the tank and sealed them. The buckets are now in my basement. I took the lid off one a day or two ago and it smelled like absolute hell(as expected.) The water had a thick film over it and there were a few bristleworms floating in there. My question is, is this rock good for anything anymore? I plan on starting up a 75-120 gallon tank and I'm wondering about the best way to cycle it. Should I just add all this rock at once along with some uncured rock from an LFS or what? Thanks in advance.