@Lukian, Pothos comes in a variety of colour forms, from dark green to lime to yellow, and different variegated patterns with either white or yellow. It is quite a popular house plant, being attractive yet tough and reliable indoors.
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I don’t know what you know about growing plants indoors. In terms of keeping them alive, given you will have picked shade tolerant plants, water becomes the critical factor. Water needs of plants can vary from requiring continuous moisture to having to dry out before being watered again. You will need to find out what each plant’s requirements are in this respect, so they can then be grouped together and treated similarly. The substrate at the warm end is going to dry out quicker, so that determines which plants go where in the vivarium.
How frequently plants needs to be watered depends on how quickly a plant uses/ loses water. This is determined by the type of plant, temperature, light, humidity and air movement. Most of these factors will vary daily and seasonally. So it not possible to predetermine a set watering regime. So you will need to learn to determine when your plants need watering. This is most readily done by digging ones fingers into the substrate to determine how moist it is around the roots. Alternatively, one should be able to use a soil hygrometer (something I have no experience with).
Substrate needs to supply both moisture and oxygen to the roots. So while the substrate needs to be moisture retentive, it also needs to be free-draining to allow air to enter it. Some mixes break down over time and become sodden and lacking in air spaces. To avoid this, a good portion of inert material such be present. These are things like sand, perlite, vermiculite, expanded clay and coco peat (as well as Styrofoam and plastic beads, neither of which I’d recommend). A mix I have used for potting and feel would be suitable for a vivarium is: 2 parts sandy potting mix, 2 parts coco peat, 1 part (agricultural grade) perlite. Very few potting mixes contain sand these days, due to the weight factor. The sandy stuff I was able to access was a locally produced mix for growing native plants
If planting direct into the substrate in a sealed base, my recommendation would be to include a drainage layer under the substrate.