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Poison Dart Frogs Poison Arrow Frogs Dart Frogs & Exotic Tropical and Carnivorous Plants with Terrarium & Vivarium Supplies by Black Jungle Terrarium Supply
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regardless plant it heavily with plenty of broms, tillandsias, fillers and moss for sure. i would throw in some anubias and ferns also.
i'm thinking you're talking a meter in height... sounds like a good setup for a paludarium. maybe a stinkpot turtle and some smaller fish in the water and a couple herps that won't particularly swim.
google hydrophite while you're at it. you might not want to do the planters and trellis the way he does but his ripariums are a great inspiration.