i noticed the last few days that my water is truning brownish orange but visibility through the tank is perfect. i added some new dift wood a week ago was wondering if that might be it. also i have a magnum 350 canister filter which im useing lava rock as my media, and not adding any carbon. should i add some carbon to clear the water up? also do small water changes daily till it goes clear again so there is no tint. i also tested my water and every thing is fine there, and there is no weird fish behavior so i dont think it is harming them. another bit of information i did wash the drift wood real good before i put it in the tank. thanks for the help.