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#1
03-11-2013, 04:25 PM
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depending on the sand it can jam up a pump really well then you have to shut it off which allows some back into the tank. results in a mess.
simply siphon the sand out with a decent-sized hose. your water will remain exactly as it looked before and it will remove the sand entirely. when adding new sand back in i swish small amounts in a bowl to remove floaties then strain it a net-full at a time under running water to remove fines. it goes back into the tank almost crystal clear. 
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#2
03-11-2013, 05:14 PM
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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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#3
03-11-2013, 06:11 PM
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I have a 230 gallon display tank and a 100 gallons sump. What I was going to do was just siphon the water and sand into 5 gallon pails. Then I was going to replace the water with new water for my scheduled water change. So hopefully when removing the sand and water I do not remove more than 40 gallons of water. The siphon hose I was going to use is a three-quarter inch soft plastic hose.
I was just going to rinse the new sand in my RO/DI water. I like the idea of using a large diameter PVC pipe to put the new sent back into the tank.
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