I'll do that then, bring the 6 gal up first, instead of moving them both at the same time. My husband says I should keep the sand in the tank when I move it, keeping enough water in there to cover the sand. I don't know about that. We moved about 3 yrs ago, but it was just next door. That's what we did then for my 12 gal. and then he just carried it over with the sand and some water still in it. I guess we'll figure that out when it actually comes time to move them, which isn't until Aug.