I am new to fish keeping hobby. I bought a 55 gallon tank. I put in fluval black substrate and a large “dragon root” wood piece. I filled the tank with purified water from my local grocery store. I rinsed the substrate throughly. After a day or so it looked like the dragon root was leaking some tannins as the water was lightly brown, after a few more days it’s pitch black in the tank. After research I learned that chem-bio zorb was great at clearing tannins. I placed one in a week ago and I’ve noticed no difference it may have even gotten blacker? If that is even possible. I’m not sure if leaking tannins would be so severe it would make the tank look like this. I put in some api start up bacteria day one and also some api accu clear. I am unsure what to do to fix this. Any suggestions or advice would be greatly appreciated.