Honest answer, I have no idea..lol.
I'm hoping the salvinia will keep the water decent but with limited oxygen supply? 🤔 i think the trick is sealing it after the waters cleared. one video had valesneria and duckweed still going after 2 years of being sealed, every other plant died (which was heavily planted btw) and multiple algae blooms and die off. Dwarf sag is similar and smaller so why not try it out. I'm worried about the salvinia though, it didnt ship well at all. I might have to replace it with duckweed if it dies off but it's a rather invasive plant so I dunno.
This whole things more of a science experiment of what can survive such conditions rather than trying to keep things alive. Youd be surprised how hardy these bladder snails and inverts can be assuming I scooped some up. We shall see!