Dont get the little bubble stone either, get the blue one that is 3 or 4 inches long, seems to do better. I have 40 dozen in a 50 gallon tote rite now, put a filter pump on it like you would use in an aquarium and havent had to chnge the water in 2 weeks. Also have one of the bigger ariater pumps with 2 lines in it. Good luck, must be nice not to need many minners, never go to the lake with less thatn 10 dozen.
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