Guidance on how to safely create a vivarium for a 1st time frog caretaker?

[deranged chipmunk]

I can definitely help with your soil questions and about the orchids, but i am at work and it would be too involved to type on my phone. I'll expand more after work, if nobody beats me to it. Btw, here's my mini Phal. In my enclosure:

[shatter]

Hey guys, i thought i would just jump straight in and see if you's could help me out a bit, {well quite majorly actually} i have recently picked up an exo terra 45*45*45 which i am hoping to house two dendrobates tinctorious azureus.

i have almost everything up until the stage where i add live plants, i just need to purchase 3 coco panels so i can fully commence.

In the meantime i was planning on starting the bottom, but im having a seriously unsure moment. I picked up a small pump and pipe to install incase the bottom substrate layer gets over flooded but im not entirley sure the best way to do this, i wasnt planning on having a cirulating water feature inside the viv, so im just wondering is the pump actually needed ..?

my other big worry is do i need to make a section at the front for a {water in} just incase the bottom doesnt have enough water for plant growth..?

i know most people use egg crate to create a false bottom if they have water features, so im deciding to use just hydroballs as the 1st layer, although i do have roughly 50cm x 20cm piece of egg crate.

apologies to get into such a long description, this will be my 1st vivarium and i just want to make sure i do things correctly, so any knowledge on this would be greatly appreciated.

everything else i have covered,{i beleive} its just the bottom thats messing with my head lol

Many thanks and i shall hope to hear some of your thoughts, your help will go a very long way.

Bob