increasing the nutrient concentration
Be careful. A nutrient burn is way more harmful than a deficiency.
It’s one of many plants that people say “do not like wet soil,”
Water isn’t the problem, it’s the anaerobic conditions that lead to root rot
Are all of those pictures of your plants really all hydro?
Yeah, the only exception is my one Drosera, which lives in the peat mix I bought it in (can’t survive in most other media) and a few of my balcony plants, mainly my blackberry (annual) and some pollinator flower mixes that live as weeds.
All other ones, houseplants (including calatheas and some carnivorous plants!) and balcony crops (cannabis, melons, chilli, etc.) are in hydro.
Here, for example, my Tradescantia (because it was a main subject of your post) and Nepenthes
