Used them to decorate two of my aquariums. They are around 10-12 inches long with a knot and several branches. I soaked them for a few days to get the tannins out, but the water never discolored, so I think they were fine. Two parts sank immediately, one had to be filled with water, which took a few days. They have quite an interesting dark brown and light brown color. You are looking very beautiful. I have two in my 20 gallon black gravel tank and one in my 44 gallon sand tank. They both look good, but unless you want to mix up all three, I wouldn't put them in any further.
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