Tips on my carnivorous plant terrarium?

Hi, I just set up this 25l terrarium/aquarium, it's still very much an experiment, I am just wondering to see how it grows and changes, but I like to do what I can to make the plants and snails live long and happily, so I am open to feedback on how I can improve!

It's got a demineralised water pond with Ramshorn snails, Christmass moss, and floating plants.
The land part is sphagnum moss, perlite, and carnivorous plant soil, with pitchers, sundews, Venus flytraps and mosses.
I have a small aquarium light on it for 8 hours a day (2x 4 hours). I plan to mist a couple times a week with demineralised water, maybe a water top up or partial water change, depends how it goes.
I feed the plants with red mosquito larvae occasionally.

I would like to add springtails or isopods, and I am thinking of making a mossy wall in the back to keep the moisture in.
I am also planning to add hydrocotyle, and some more mosses and floaters to the water.

What do you guys think of it?
Did I miss something important?

I have a couple of questions:
For hybernation of the carnivorous plants, is it enough to keep it near a window and turn the heating off, or do I need to remove the sundews and place the whole terrarium outside for the winter?
Will I run into bacteria or mold problems in the soil and how could I prevent those?
Are the mosses, floaters and snails enough to keep the water clean?
Any other tips and suggestions are super welcome!

Thanks in advance!