can I do it myself or do I need to buy the tank with the waterfall or river already made into it, do I have to cut the tank to put in the fall

You can do it yourself. In fact there really isn't anyway to do it otherwise. There is no cutting of the tank, its all about construction and supplies.

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My name is Liz
Dubia Roaches for sale. Mixed Nymphs - 125/$25 plus shipping.

I have to disagree with you liz, I know a lot of dart keepers have waterfalls/rivers in their tanks, but it isn't needed. Their are two species of darts that will only breed in the near of running water but they are very rare to find in the hobby. A lot of dart keepers also have started using expanded clay, Tree fern, or even covered syropor for the substrate to keep tanks cleaner. With a good misting the wast falls into the drain and then in to the sump tank to be tossed or filtered back to the misting system.

Here's a good link with insructions on how to build a tank with a waterfall without substrate. The instructions are in German but you should get the idea from the pictures. Heres the link E.N.T. Terrarientechnik - Regenwaldterrarium mit Berg und Wasserfall

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Amazon Tree Boa Nut.
http://www.coralluscaninus.info/TreeBoas.html
http://dght.de

Yes, I forgot to say, a waterfall ISN'T needed. Heavy misting can take the place of a river or waterfall. Live plants are they key. It will help create a self-sustaining tank.

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My name is Liz
Dubia Roaches for sale. Mixed Nymphs - 125/$25 plus shipping.

If I were as unsure about the animals I was about to keep as it seems as you are, I would not get them! Start out with something a little less complicated and easier to keep and maintain. Get your "feet wet" so to speak. Read and research before you commit to PDF's. (You wouldn't want to make a mistake and harm yourself, family, loved ones. That's why they are called Poison Dart Frogs!)

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Have a great day, and a better tomorrow.
Semper fi

"It is just like man's vanity and impertinence to call an animal dumb, because it is dumb to his dull perceptions." ~ Mark Twain

WG -

Hate to say it, they aren't poisonous in captivity....

But you are right. Much more research has to be done before they should be purchased. Don't forget feeding them. You need to be well rehearsed in breeding wingless fruit flies as well!

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My name is Liz
Dubia Roaches for sale. Mixed Nymphs - 125/$25 plus shipping.

The frog's poison comes from certain insects that they eat in the wild. Captive born darts are lacking in this dietary source and are not toxic.

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Merlin,
What's Life Without A Little Magic!

Thank you Merlin. I had no idea that they needed to develop the toxins in the wild. The uninformed has become the informed. My apologies.

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Have a great day, and a better tomorrow.
Semper fi

"It is just like man's vanity and impertinence to call an animal dumb, because it is dumb to his dull perceptions." ~ Mark Twain

No problem. I wouldn't have known either except that this topic has come up before.

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Merlin,
What's Life Without A Little Magic!

even wild-caught specimens lose their toxins after 6 months. Not that anyone should encourage capturing of wild animals for pet trade. It's just a fact I came across when I was researching the frogs. I'm still tossing the idea around. The real kicker for me is the whole culturing of insects. It sounds like a lot of work, and I'm a pretty lazy person.

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Only when the last tree has been cut down
Only after the last river has been poisoned
Only after the last fish has been caught
Only then will you find that money cannot be eaten.

Cree Indian Prophecy.