Bromeliads and other epiphytes can be pegged to backgrounds such as pressed cocoas fiber, cocoa fiber matting, cork bark, etc. by bamboo skewers placed to support them until they form their own attachments, or even metal horseshoe shaped tacks. Remove them from the pots. I usually pack a little long fibered brown sphagnum moss around the base as well. The bromeliads are watered by spraying them with spring water using a hand new hand sprayer (can be purchsed at either a nursery or the household section of a grocery store.) Keep some water in the bromeliad cups at all times. Otherwise, they don't need wet roots.
I've posted this many times, but here it is again. This is my 135 gallon "palludarium," which is what one calls a combination of aquarium vivarium. The land portion contains Dendrobates galactonotus. The aquarium porion has small tropical fish like tetras and some of the smaller algae eaters in each section that keep the glass and logs clean. The deepest pool is 11 inches and the most shallow is 6 inches. Each section flows down over a glass barrier and a pump returns the water from the left end and back over two water falls, One is in the center in the lagoon and the other goes into the deeper pool. This also adds some extra denitrifying filtration as the plastic tubing becomes colonized with denitrifying bacteria that you can add in the beginning to stimulate this. There are small logs from each section to the land so that if the frogs inadvertently fall in, they have an easy egress. Mine have fallen in several times and can get right back out. While darts are terrestrial, they can swim rather well in a pinch. They do need an easy egress, however, or they might eventually drown if they can't get out. This particular set up has worked very well for about four years with only frequent partial water changes and soil topdressing, but now is in need of some major plant and soil revamping now, especially in the center portion. This photo was taken shortly after the frogs and fish were first introduced. The fish will eat the fruit flies that fall in the water, and one of the galacs in particular likes to go fishing by climbing down a log to the edge of the water. One time, he inadvertently caught a tiny baby platy fry. The frogs must communicate somehow, because within minutes of this wonderful catch, they were all down there lined up trying their luck. This was the only catch I ever witnessed, though.
You might not want to combine fish with the more toxic toads that like to soak, however.
In this setup, I used our local Mountain mahogany for the underwater egresses. This is a very dense wood and doesn't rot under water to land eggresses, but you can use other dense wood like cypress root, manzanita roots, Osage orange, etc.
Oh yes-- in this setup, the land area is only drained into a sump that is separated from the aquarium by the glass barriers that contain the aquarium portion. These were siliconed in. There is also taller glass behind each waterfall to keep the aquarium water from splashing back into the land section. There is no real false bottom, only a drainage area that I clear out by siphoning off the excess every once in awhile with an airhose tube.
I also tried some African dwarf frogs in the aquarium. They didn't prosper there, possibly because I also added some red clawed crabs tended to climb into the land section and compete with the land frogs for territory as well, so I removed them. They never actually hurt the land frogs, but seemed to annoy them. They may have been responsible for the death of a couple of ADF's before I caught on, however. I'm not sure.
I just hope this gives you some ideas of your own. Having a tropical aquarium with a submersible heater and the falls, etc. really keeps the entire tank temperatures stable, cooler in summer and warmer in winter than my house temperatures, and does a lot to stabilize humidity (especially the high humidity darts need.)

-----
Patty
Pahsimeroi, Idaho
4 D. auratus blue
5 D. galactonotus pumpkin orange splash back
5 D. imitator
6 D. leucomelas
4 D. pumilio Bastimentos
4 D. fantasticus
4 P. terribilis
4 D. reticulatus
4 D. castaneoticus