I am assuming you mean a 20 gallon long which is okay depending on the size of snake, for adult I would recommend a 30 gallon! Balls are usually nice without handling but I would say at least every two weeks you should handle it but not within 48 hours of a feed! Babies do well in a 10 gallona nd can stay in it for 6 months to a year! Males are alittle nicer because females have the babies so they are a little more defencive but both are really nice when handled! Rarely to they bite and I have never been bit in my experience! Welcome to ball ownership!