moving tank question?

I think you need to start over with mostly new sand -- just skim off and reuse the top 1" of the old bed to get the beneficial critters. If you dig too deep (or dump the entire depth in a bucket), you'll mess up the bacterial zones and be dumping sewage into a new tank's water column. If you insisted on keeping the bed, I know of no way to keep it in any productive shape unless you can move it all just like it sits in the tank now.
 
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