Hey all, It has been quite a while since I've been active on Tonmo, but I'm back! I had a quick question that I am pretty sure I already know the answer to, but I thought I'd ask just to make sure. A friend has offered me several 5 gallon buckets full of dry sand from his FOWLR tank that he just took down. He dosed copper on several occasions in this tank. I am looking to set up another tank for cuttlefish, and was wondering if this sand would be safe to use after thorough cleanings, or if copper could still be present in the sand and it would not be ok to risk. My guess was that it wouldn't be safe. Is this correct? What are your thoughts?