Hi

Asian common toads are beautiful toads, so I'm very jealous. The water dish should be changed everyday to keep it clean, unless large amounts of water are used and filtered. Usually toads may excrete their toxin as a defense, so make sure not to handle it unless cleaning the tank. I would attach backgrounds to all but the front to make it feel secure. Whatever you do, do not try to squeeze the glands dry. Toads can become very fat in captivity and scoff down any food you give them so avoid feeding too much or they will become obese. Usually feeding twice per week is suitable for adults toads

Jason