Have a massive fish tank with tropical fish

My husband gave me my Christmas present early, partly because he was excited to give it to me, but mostly because he didn’t know how to hide, then wrap a 40 gallon fish tank and fit it under the tree. I’m going to start setting it up tonight. So excited!

I have a 6 gallon right now, but want room for more fish! Someday I’ll raise guppies again. So fun, but so difficult to keep them alive without messing up the balance of the tank and without the adults eating the little guys!