Dear Sir: After finding your name over the Internet, I was wondering if you had any suggestions on how to "sterilize" or "cure" a piece of wood for an aquarium. Recently, I cut a hollow cypress knee, boiled it, and then peeled off the bark. I then placed it in my 55 gallon tank and it turned the water brown. Do you have any suggestions for making a piece of wood suitable for an aquarium? Thank you. Chad R. Hutchinson (chutchin at teclink_net)