Dart Den - Follow this ongoing discussion about whether or not water features are necessary in dart frog enclosures. Some believe that, especially for beginners, it is an unnecessary complication.
Building Concrete/Cement Water Features
Tortoiseinfo.org - Here is an excellent recipe for building completely nonporous, waterproof mortar that is also exceptionally strong. Extremely useful for the handy folk among us who want to build outdoor ponds and other water features for their reptiles and amphibians.