Percularis

I'm not exactly new to frogs, but the idea of keeping them as a hobby is new to me. I've been catching frogs since I was five or so. I was thinking of setting up THIS (12x12x18) for two or three PDF. As of now I'm wanting to order from Alpha Pro Breeders. I'm not sure which types would be best for the terrarium I stated above, but I'm interested in THESE. Would two or three of those do well in the terrarium I listed?

I come from the wonderful world of saltwater aquariums and I don't tolerate unrealistic things in a habitat for an animal very well, so I'm going to throw out the plastic plants and replace them with live plants, however I do plan to keep the vine that comes with the kit because it looks nice.

I already know PDF can't swim well so I plan to have no bowl/puddle of water in the tank. I plan to be misting the frogs with a mist bottle two times per day. What type of food is best for the Azureus PDFs that I want to keep? I don't want anything that will get loose in my house and/or moves fast. I don't want any foods that I need to be cautious of.

If there's any other info you think I should know, please let me know.