hi there! they would need a minimum of a 20 gallon long (not tall) for one. Any additional axolotl after that needs an additional ten gallons. so if you have two axolotls, you need a 30 gallon minimum. Length is always better than height. Depending on size black worms or frozen blood worms are a good staple for young juvenile axolotls. when they get older nightcrawler or red wriggles are the staple. you might cut them up. Also make sure you buy from from a fish shop (always live) or ones that haven't been exposed to chemicals ( like from gardens.) pellets can be used for adults also not so much very small babies. if you email me i can send you a basic care sheet. ashseek@live.com just ask for a care sheet so i know