When young frogs are leaving they are initially vulnerable to de-hydration. It is particularly important to ensure that the environment is well watered at this time. Certainly any frog that you see in the tank with four legs and a tail of 1cm or less can be taken and placed on the surrounding bushes to avoid ground predators (the exceptions are the ground frogs which need to be placed in a sheltered ground position). Many frogs will begin to leave when their tails are approx 1 cm long. If you do release them yourself, the best time is at dusk.

Pacific or Honey Blue-Eyes fish (both native species available from pet shops) will control mosquito larvae and won't harm tadpoles of 1cm or more in length. If these are not available you can use White Cloud or Mountain Minnows. These fish are not native to Australia and great care should be taken to ensure that they are never released into local waterways etc.

The spraying of pesticides accounts for significant reductions in frog numbers. Household and garden pesticides and other poisons are ingested by frogs either directly through their skin or by eating affected insects, generally causing a visibly painful death for the frog.