I found this last year. It's about 3' x 2', sorta. It was too big to boil so I soaked in bleach/water for 24 hrs. and rinse/soaked for a month. The bleach took out most of the tannins as the last week of rinsing the water had almost no color. Started soaking again today to put in upcoming 125g discus tank. I love all the projections coming off the stump. I see bolbitis, java fern and petite nana in its future.
Mark
Mark