John,
Thanks for the advice. The prospect of rinsing 8 bags of gravel isn't too appealing, so that's welcome news! I'll also check out the Aquasoil, though that seems harder to come by than the EC. As for anything from my current tank, that's getting a bleach bath as soon as the fish move to their temporary home. I'm even quarantining the fish between homes to avoid any trace of the old tank contaminating the new. I'll need to start the biological filter from scratch, but that's something I've had some practice with.
Mike
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