- Aug 11, 2016
As a general rule, how big a tarantula can be kept in a 2.5 gallon aquarium? I realize there are many factors that can effect this. Necessary substrate depth, terrestrial, fossorial or arboreal. Let's assume for craps and giggles you have an immature Ladiadora parahybana. At what size do you upgrade? For a burrower, let's say a ceratogyrus species, the depth of the tank is 8 inches. So you would probably only be able to give 6 in of substrate depth? Therefore you would still need to upgrade to probably a 5.5?