I keep and breed pairs in 20 gallon tanks. I don't use filtration but you can if you want.I use gravel as a substrate and use no decoration.They are not really that used to hiding in the wild.they usually sit right out in the open on leaf litter. Putting decoration in the tank just takes up space.even when they are on display in zoos with plenty of decoration they usually just sit out in the open. 20 % water change weekly.