What is this plant?

[envirosci]

What is this plant? The little heart-shaped plant that covers the most part of this vivarium? You could see most of them is on the background wall, and there are some plants on the ground.

[Vince]

Looks like creeping fig (ficus pumilo). It is a very easy and fast growing plant that will quickly fill in and over take your vivarium unless it is pruned regularily.

[envirosci]

gasp* ... then I will definitely put the plant in the pot when I put it into my vivarium, because that might be able to limit the growth? ...

[Epiphile]

The larger heart-leaved plant is Philodendron hederaceum, and Vince is right about the smaller one. I'd just plant it in the substrate- nothing wrong with having plenty of cuttings for other tanks. The roots of the plant would likely just grow through the pot into the substrate below anyways.

[envirosci]

What if I seal the pot with some GS

[Epiphile]

Your plants' roots will become waterlogged and the plant will die. Drainage is important.

[envirosci]

ouch ... eh ...
Well, the whole point of my vivarium project is to create a self-sustained ecosystem, I don't want to cut the plants and open up the tank frequently ...

[Epiphile]

It's really difficult to create something fully self-sustaining, I think, particularly in a small space. Healthy plants will grow vigorously, so some trimming will definitely be neccessary.

[envirosci]

gotcha, will do.

[red_goby]

You have a nice lil viv by the way... Have you though about any more ferns for it? Or maybe a polka dot plant? Something with color could bring out your habitat nicely!