If you tried distilled water might break free the NH4 by the means of Osmosis.
But if it is a true ion bond you might have to heat up the water to give more energe( boilling). It probly wouldn't remore all the NH4 and trace elements. Maybe enough to change half of the Zeolite at a time.
It would be like posban from two little fish, good for about charge 4 or 5 times before adding new media.
Just athought about recharging Zeolites.
I have been using Zeovit for just under 4 weeks now, and I'm pleased so for. Would like to try some additives in the future.
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120 G sps reef, looking to build bigger. 
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