These small Lophs are about 4-5 months old. They were slowly acclimatized to ambient RH more than a month ago. At that time I started to water them at least every other day with 5-10 cc's in "soil" immediately around them. All seemed well for awhile, but they have seemed to shrink a bit and start turning dark. I've read that turning dark can be a sign of over watering. They've been under the same CFL that they germinated under, but lately as the seasons change they have gotten a taste of direct sun through the mostly closed blinds. Thoughts...suggestion???

Sorry, I can't figure out how to insert pictures...maybe I can't as a new member?

Anyway this could be moved to the cacti forum?

Sounds like over watering. Not sure how different seedlings are, but cacti shouldn't be watered more than once a week, better bi-weekly. Not sure what you could do at this point. The soil looks wet even in the pictures. Maybe transplant them to a drier, better draining soil? Should probably wait for more input.