just want to help out your poor froggie here...
first off, heres an idea:why dont you turn the 29 long onto its side so its one really tall tank? i had a really long 40 breeder,and turned it on its side and my frogs are hardly on the floor. the floor room is not missed a bit. they need more climbing room then anything. think about it.
2nd, i know whitney has advised against it but i do think that a 29 gallon will be okay for 2. the minimal for a whites is a 20. for 20 its 30, so your only short by a gallon, i think the stretch can be made. but bigger is ALWAYS better. maybe invest in a bigger tank anyways?( i didnt keep mine in the 29 for long,theyre now in a 40)
3rdly i noticed you said you had 2 swimming areas, used cypress mulch substrate and had no background on your aquarium. swimming areas are not needed for tree frogs. they do need a very shallow water bowl, but it should be any deeper then an inch. somehting do so they can just lay in, no more,no less. how deep are the water areas you have? about the cypress mulch,get that out of there. i know you dont feed the frog in its tank, but there is still a huge risk with it in there. it could eat the mulch,you dont want that to happen. go get one of those bed a beast bricks(also under the name eco-earth) it is compressed coconut fiber, you put it in a pail or bucket of water and it expands up to 8 times its original size,it works super well.the reason the frog has the noserub is because its been trying to escape most likely. it doesnt feel too secure in its enclosure. do you have branches and stuff for it to climb on,and plants and all? what are the temperatures like?humidity? how often and how much do you feed?
i think feeding the fro gin another enclosur eis okay,i used to do that when i was new and trying to keep track of my frogs,i fed them in seperate ocntainers so i could monitor how much they ate. i gave up on that and just throw crickets in now.
get some background on that tank! can yuou post some pics of your tank for us? maybe we can help you further. you should get your current frog straightened away before you get another or even look into getting another.