Today the column lost some critters! Oh, my! The original black bug with a red orange stripe passed away and so did our tadpole. The column had plenty of condensation as usual. But it was even more moist then yesterday because I could see mixing of the clay and river sand. The two minnows were still swimming and we saw the leech move today. The snails were still snailing and the duckweed was still green. all of our plants were green at the top and I poured a large cup of water through the column to watch it percolate. There appeared a new black bug or a previously unseen bug - it was all black. We hypothesized that our aquarium water is remaining clear due to the layers of clay, river sand and black soil in our upper chamber is acting like a filter. Why wouldn't the decomposition chamber cause the water to turn brown? Is our decomp. chamber not working? Did we not have enough water in the column? Why is our banana now turning green?
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