Just an update. Looks like those 'concerned' plants aren't doing so well. They have started to wilt and develop brown spots and holes in the leaves. I'm going to let them go on their own until they fully die but I'm not holding on to hope. Ah well, 3 out of one still pretty good and at least one more seems to have a chance to grow a new leaf but its not doing well, it's developing holes in the existing leaf. Already gave one of the 3 healthy plants away to my co-worker. Another will go in my office. I replanted those 2 again because I think the pots were just too small, but I didn't re-do the soil for fear of shocking them again. I pulled out the plant retaining as much of the soil ball as I could and added more to it in the bigger pot on the bottom and sides. They seemed to not care and are still going strong. Going to do the third one that way too. I've found the self watering pot my coworker wanted to use actually useful, but not the way they were intended. I can flush from the top without directly draining and then pour off the excess out of the watering funnel. If given the option between the normal attached saucer or the self watering saucer, this is better. Though I still like the idea of draining into the saucer of stones. I may do that one yet. Aside from the Peace Lily, I've been taking advantage of this new experience. Replanted a rather healthy but root bound poinsettia in the second batch of soil I made with the 1/2" screen. This batch turned out much better, a lot less fine that the first, still a lot of sapwood though. I mixed this batch with the 5:1:1 ratio. My seedlings are doing well, currently they are in a store bought seedling soil in a tray. Can't wait to get them in the window boxes, but they have a month or so before that happens. I have Unwin's Dwarf, Columbine, English Daisy, Alyssum (purple and white), Bachelor Button, Coleus, and a white and purple "bluebonnet looking" dwarf plant I can't remember the name of. I just wish I'd started them in January, another week and we will be beyond the last possible freeze for my area... unless we have a weird April again. Even still, it's balcony gardening. I can always bring it inside.

I'd check to see if the mix had completely hardened off (which peaty mixes tend to do) interfering w/ the plant's ability to drink. Likelier than not, it's because of the poor mix, not under or overwatering. Sorry, don't know what a catch filter is. Thinking has changed on the layer of rocks down below, that is now though to be a bad idea interfering further w/ proper drainage. I'd unpot the whole thing & check if the roots are still alive, before trying to do anything else; it MAY be too late, can't tell w/out unpotting it, sorry.

It's pretty common when repotting to have a period of droopy leaves that can last more than a day. Fine root hairs can be damaged or lost during the process, impeding the plant's ability to take up moisture. Roots exposed to air can also dry out quickly during repotting. In either case making the soil wetter isn't going to help. The plant just needs some time for the root system to recover. A common recommendation on this forum is to use a thin dowel or wooden chopstick, inserted into the soil down to the bottom of the pot, to test for soil moisture. Is it damp when you pull it back out? If so, you shouldn't need to water yet.

I've had mine go completely bone dry before finally beginning to wilt. This wasn't intentional, I only mention it to point out that the wilting isn't from underwatering. Peace lilies love water, but their roots also love fresh air, so drainage is a must. I would also advise giving it much brighter indirect sunlight. Just because some plants can tolerate low light levels, it doesn't mean that they prefer it that way. Never seek advice from a big box employee. For most of them, it's just a job; they're paid to be there. They don't care about providing accurate advice. You're better off seeking out someone shopping there that actually wants to be there. More often than not, that's where you'll find me, HaHa. I've certainly helped other shoppers whenever they needed it.