A well fed African Bullfrog will grow more than 1 in. per month the first few months of life. If you have a medium or large critter keeper or small tank already at home, start with that. If not, start with a 10G, which will fit it for first couple months. PETCO has the Aqueon line on sale for $1 per gallon until the 27th; good deal to stock up on tanks now .