Hi. I'm a visitor from the freshwater forums! I have a question that I think reef-keepers might be able to answer. I have a 20 gallon tank that I plan to sell on craigslist. I formerly used it to QT some new fish, who I treated with Coppersafe for 10 days. My question: Is it true that the copper leaches into the silicone and makes this tank permanently unsuitable for reef systems and/or invertebrates? If this is the case, then I'll make it clear in my craigslist ad that the tank should not be used for reefs or inverts. Thanks!