Housing;
One or two adults will be fine in a minimum enclosure of 48”W, 24”D and 24”H. I do not recommend keeping more than a single pair in an enclosure. Two males should never be housed together. Two females are fine together.
An arrangement of both vertical and horizontal branches should be used. A hiding den is a must. Plastic plants work well for decoration and are easy to clean.
Substrate can be coconut fiber, bark or peat moss. Do not use stones, sand, black dirt or wood chips. Keep in mind that what ever you use will be eaten and carried into the water dish constantly.
Heat and light;
Ambient temperature should range in the upper 70’s to low 80’s. A hot spot of near 90 should be provide. Make sure your animal can find a cool spot to relax as well.
5% UVB is essential to the production of D3. Never, never, never give a reptile D3. They must produce it from a D complex in order for their body to use it. Raw D3 goes directly to, is stored and builds up in the liver.
A timer should be used to maintain a true 12-14 hour day in the summer taken back to 8-10 hours in the winter. A timer will lower stress levels and aid in the overall heath of your animal (yours too).
Feeding;
Physignathus do very well on an insect diet. Crickets, meal worms and wax worms are good food sources. Crickets and worms need to be coated with a good calcium based multivitamin dust. Molly fish raised in brackish water are good for them and help prevent dehydration. They may have to be tease feed the first time but once they get the taste they love them. Occasionally your animal may take greens or vegetables. Those suited for Iguanas are also fine for Water Dragons.
An adult can be feed every day or every other day. Juveniles should be feed everyday. Do not over feed but make sure your animal is not starving.
Water;
Water dragons, true to their name, require a large water dish. They will spend a lot of time in it and they will also defecate in it. It will need to be changed daily if not twice a day. Make it large enough for them to immerse themselves in but small enough to take out and clean. Do not panic if your dragons goes to the bottom and stays for up to three hours, they are hiding. Just make sure they are out before the lights go off.
Humidity;
High in the morning, near 100%. Allow it to naturally drop slowly throughout the day reaching a low of 60-80% by night fall. Substrate should be damp but not soggy. They need to dry out or they will develop skin rot.