Hi! Many people feed based on time. They allow 10-20 minutes for the frogs to eat as much as they like and then remove the rest. This is done every 2-3 days for adult frogs, and more often for young frogs and froglets. Also important is vitamin and Calcium dusting regularly. This site's food and feeders section has a sticky on dusting schedules for that. Good luck with your new treefrogs! If you have any more questions, please don't hesitate to ask.