here's another overview

Welcome to kingsnake.com's message board system. Here you may share and discuss information with others about your favorite reptile and amphibian related topics such as care and feeding, caging requirements, permits and licenses, and more. Launched in 1997, the kingsnake.com message board system is one of the oldest and largest systems on the internet.
here's another overview

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This pic looks like a dragon can sit on the waterfall, and lead/redirect water all over your tank... perhaps this isnt the case.
though, if it is the case.. its only a matter of time before the water has been pumped completely out of the pond.
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i think you need more plants. your tank looks big enough for some cane or bamboo.
maybe some water/wetland plants- you have enough current in your tank, and theyll help clean the water, too.
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