If the tannins bother you - it will make the water look like a fairly dilute tea... the more tannins, the darker the tea coloration - you can remove the tannins by putting carbon in the filter. The carbon will adsorb the tannins.
I don't recommend it, as I like the look of tannins, and actually miss mine (my driftwood has been in the tank so long that I can't notice an effect anymore). I've actually purchased rooibos to add tannins to my tank (and polyphenols) to give me the color and the anti-oxidant properties.