well maybe(key word "MAYBE") you could split the 29 gallon in half with some thing thats not see through and there are no gaps anywhere(top, bottom, sides, etc.), then you could put rosy in one half on the tank and the new one on the other....but you'd still end up having to buy bigger tanks down the road as the snakes get bigger...this is why i love my sterilite and rubbermaid tubs not to exspensive and come in a wide range of sizes so when the snake grows there another tub of the right size and you dont have to pay alot of money for.
going now..
Beothon Lover