The water itself is less of a thing than keeping the rock fully alive. That's your meat and potatoes. The water is more of an aperitif. Post meal version.

The sand, once disturbed, IMO, should be thoroughly rinsed before reintroducing into the new set up.

I'm thinking you probably transported the tank with the sand bed unmolested, however just moving rock around in an established tank can cause a little cycle. Much less moving across town.




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