I know the tannins from the driftwood wont harm my p's, as long as the pH doesnt get drastically affected, but i have been soaking my driftwood in a cooler of boiling water for 3 days now a regularly changing the water and still getting a lot of tannins. I'm thinking about just putting them in the tank anyway. Its a 75 gal with about 10 turnover filtration. does anyone have experience? How yellow will it turn my tank? how long will it tank to stop the tannins from seeping out?