It isn't exactly that they're delicate. The reason everything is bleach-dipped/baked/boiled/fully dried before use in a dart viv is (a) most plant cuttings from other hobbyists were grown in a dart viv, so disinfection against environmentally persistent pathogens is simply a standard bit of biosecurity, not unlike QT and testing of animals and (b) plant pests (scale, snails, slugs) can wreak havoc in a dart viv, and bleach dipping is moderately effective at killing those pests, and (c) there are predators on microfauna (some dart species are dependent on a stable population of microfauna for at least some of their life cycle) the introduction of which can be prevented by disinfection of all materials.
That's a nice viv for what sounds like fun T. How does the species compare to more familiar but possibly similar ones like avics and GBBs?