There might be books available about the subject, but more than likely your best bet is going to be the internet. Here's a couple links that may be of interest and/or worthy of your consideration: Freshwater Aquaria: Considerations for Constructing and Operating the Paludarium, Part 1 ? Advanced Aquarist | Aquarist Magazine and Blog and Freshwater Aquaria: Considerations for Scaping and Stocking the Paludarium, Part 2 ? Advanced Aquarist | Aquarist Magazine and Blog