Hi .

Here's some education for you about the nitrogen cycle in an aquarium. It will teach you about what happens within the water and how to manage the water quality.

http://www.cs.duke.edu/~narten/faq/cycling.html

Please ask questions after reading the article. Bullfrogs need a pond area in their homes so you will need to learn how to cycle an aquarium or pond area and how to regulate and decrease toxins. There are also some easy to follow YouTube videos.

Hope this helps .