keep them in a large but relatively flat tank filled with fresh, still, dechlorinated water (change out part every couple of days) feed them fish flakes (crumbled up if needed) finely chopped lettuce, and/or mosquito larvae and add some plants and grass for them to hide around in. when they start developing legs, and a large, flat ish rock that they can climb onto when they’re ready. once they have fully developed legs, transfer them to a tank with soil, bark, rocks, moss, and sticks for them to climb and hide. a fully grown one will need at least 10 gallons per frog. good luck!