I think the firebelly toads would be perfect for what your looking for. They are very active and colorful little guys, and they do great in planted tanks. I think what your after is more of a paludarium type setup? I've seen some very cool vivs with water features but you have to be careful if you want a dry land portion. A waterfall will easily saturate any soil in the tank causing all kinds of issues. That's why I don't do water features in my dart frog tanks, to much work.. But if done right the results are awesome. The key is to choose plants that love the water (anubius, crypts, java fern, aquatic moss, philodendrons, bog plants, etc..) and plant them next to the water feature. Or you can elevate the soil using a false bottom ( eggcrate, gravel, expanded clay...) and create a ledge that keeps the land and water area separate for the most part. There are alot of options for construction and it all depends on what you want to do with it. IMO, building the tank is the funnest part. Just take your time and build it right. Good luck!
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