I would shut off the return pump and close the sump off from the display to prevent any more leaching. Also, NOTE to self (actually I mean OP & everyone else): You should never do anything major to your tank just before taking off on holidays. That's just asking for Murphy to come visit and bleep with your tank.
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If you see it, can take care of it, better get it or put it on hold. Otherwise, it'll be gone & you'll regret it!
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