I noticed my water on my 125 gallon has a slight green tint to it. I checked the water today and all the parameters are fine the ph is 7.6 ammonia was 0, nitrites were at 0 and nitrates were 10-20 ppm. I do have drift wood in the tank I boiled the larger piece for two hours and then soaked it for 2 weeks. One smaller piece I boiled for 2 hours then put in the tank. Could it still be seeping tannins??? It was in the tank for a few weeks now but just now seen the tint to the water.