

New to peace lillies. I think I overwatered my plant. Should I change the soil now or wait & see if it rots?
The plant below (bought it from a nursery like this) -, has 3 different plants in a pot. 2 seem ok. But the smallest one has all droopy leaves.
It's by an east-facing window but only gets indirect light because I have another apartment building blocking it. I did buy a giant LED light to add light (cool daylight) to my plants.
I watered it only once - after it began to droop. And most of the leaves perked up but the bottom ones are still droopy (one of the plants). Any help is appreciated!
The soil is what I got from the nursery. Feels airy and well-draining but maybe I need to mix it up a bit near the sad plant?