I’m building a 55 gal viv for FBT’s. We are doing 2/3 land and 1/3 water. I have a waterfall/filter and fogger for the water side and I have a few ?’s for the land side. What is the best growing medium to use for live plants? I plan on using pothos, jade, spider plants, prayer plants, frog moss and a few grasses to start. I want to make sure I use the right stuff since there will be no drainage. I don't want things growing ickies underneath.
Also, I would love to create a little pebble lagoon on the land side with a little rock river flowing back down into the water side. We have already positioned the lexan seperator for the land/water sides. Can anyone think of a way to accomplish this lagoon now that we have already seperated things? So far the only thing in the tank is the seperator, we are waiting for it to cure before we start adding anything else. This lagoon is an after thought. I'm not to familiar with pumps, but isn't there something that I could put on the water side and run a tube (buried) up to the lagoon to bring water up? I would just want it to fill up and over flow into the river back to the water side. I'm thinking of using pvc to make the rock river.
Here is a pic of the tank now. I’m going to build up the water side with gravel so the waterfall will be up higher. Oops, another ?.... What is the best way to hide the cords used while also keeping it secure for the fbt’s. I don’t want anyone getting out

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There are so many ideas running through my head, but I'm just not sure how to put it together. I still need to get the plants and more things for the land side.
Any suggestions thus far?