Hello And I Need Some Suggestions

[Smillermom]

Hello all! I am new to your forum and have not veiwed forums for a few years now. I have to say this is a very organized, very informative one! I hale from Northern New York State. I have a 75 gallon fish tank that is very established with community fish. My question is this. I have had driftwood in the tank for 3 years now. I went through a week with the boiling/soaking process. My aquarium still has tannis leaking into it. I do a partial water change every week of around 15-20%. I don't change more than that as what I have been doing is working well for me and knock wood, no fish disease or probs in over 3 years. I have not been using carbon in my filter system. Will adding this help eliminate some of the tannis? Thanks so much for your help with this.!