Hi,

First of, great site! We have 4 frogs (2 fire-bellied toads, 1 Bumblebee Walking toad and 1 green tree frog) all living in different vivariums.

We have just revamped our fire-bellied toads to mimic as best their natural environment. 1/4 land, 3/4 water. They are really happy with the change (we've had them for a year now). We have a water filter. Here are my questions:

1. Since there's about 4 inches of water, we are thinking about maybe introducing some fish in the tank. Now I've read different opinions on the net... What is a rule of thumb if possible. Better fish than others? We think it would also help clean the tank.

2. We would like to add perhaps a water heater. But since there's only 4 inches of water, it is hard to shop for a good one. Any suggestions, if a heater is needed at all? We have a very low uvb light above the tank for the plants, and the average temperature of the tank is around 23 daytime, and drops to 20 at night.

Thank you,

Eric