Two different thoughts...you can "compost" your silt with bottom aeration, using a high volume, low pressure compressor designed for such use. Read through some of the aeration posts.
Secondly, the "tea" color can be changed by altering the water chemistry. Test your water and look at pH, alkalinity and hardness. Tannin stained water is acidic. Buffer the acid with aglime and the color usually changes. I have changed tea colored water with aglime, and minimized organic material by aerating.
