Help with my terrarium

[GoldenBellTreeFrog]

Well, i'm kinda new to the whole frog thing, i have 3 green and goldenbell tree frogs in an exo terra enclosure. Iv'e had them for about 6 or so months now and they are going great. But i need some help since i live in christchurch, new zealand. Where can i get some substrate from? my local pet stores like animates or cyberpets don't have any eco-earth or things like it. At the moment i have small pebbles but i'm afraid of impaction with my frogs, i know i can use bigger stones but i'd rather have a planted habitat. Also, when i get a substrate, what are some good ways to seperate the water from the dirt?. I don't want to be using dirt from my back yard as i'm unsure of what it has in it that could be harmful. Thanks.

[Kristen]

Try a local garden supply store or something like that, they might have coco fibre. It's best to get them off the pebbles.
You could get a glass divider put into your tank to separate the dirt form water. But there is other ways though
Yeah probably not the best idea to use dirt from your backyard

[Nano]

Look at this setup I've found (not mine)... it might give you some ideas

This is the link to the all the steps Construction of My Aquaterrarium