Hi guys I have a quick question. A buddy of mine is selling his tank to downgrade. So he wants me to hold on to couple of his corals he wants to keep and a couple pieces of live rock. But about 2 months ago he used rid-ich because he had an ich explosion and lost a bunch of fish.. But since then he has gone fishless for 2 months and used rid ich to rid the system of ich (Hopefully). But do I need to worry about the rid-ich that may have soaked into the live rock may leach something not good into my system. Supposedly its reef safe but im having enough issues in my system and didn't want to add another problem.. Anyone have any experience with this product?