Grows dead easy. Limit the current a bit on top , throw in a bit, blink a few times and it will have covered your tank, well maybe not that fast. It grows in the lakes around here in MN. I have heard of people using it for food. If that was my goal I would just throw some in a plastic tub, with some light and put a bit of ferts in every once in a while. It is sort of a pain in the ass because it grows as fast as duckweed but is the size of a pinhead, so it sticks to the sides worse then duckweed and just gets everywhere etc.
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