I will leave it in and just do water changes to keep the tannins stable, because i just realised, here's a question for all of you, where do the fish come from in the wild? Lakes, rivers, creeks... right? So if you think about it, all those bodies of water has tannins from dirt, branches, dead leaves etc. and that produces tannins naturally just like my new aquarium. So it is safe! And the tank is now officially cycled (so I'll be getting some more fish this weekend) and I can put any fish that thrives in ph's of 7.0-7.8! So, I think it's fine, and in 6 months or so, the tannins will be gone!!! So, thanks for your help guys, but I'll leave it be now...