To Germany?? And you DON'T want to get a smaller tank?

I would think it would be a lot easier to get those two into smaller tanks, or possibly tubs, for transport ease and sell the big tank to try and get some money back for the new stuff. You COULD technically keep the bigger one in that tank, as long as you had plenty of hiding spots to help it feel secure, but I would think smaller tanks would be easier to move and care for. But that's just me.