Maybe syphon sand into large bucket and overflow mosly just water (maybe a sheet or filter of some sort here to catch the fine bits of sand still turned up in the water) into a larger pail underneath with a pump returning the water to dt? Idk if that makes sense? I was picturing a 5 gallon pail on a box over a small kiddy pool with a retun pump and a sheet/filter between the two? Now that i think about it tho... Syphon into a smaller tank with an overflow into a sump and return the water to display. Sand should stay in smaller tank with overflow, no?
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