When I moved my adults snowball colony to a low pH tank, like 5-5.5, they all died over time. When I moved a handful of moss from my PFR tank and dumped it into a 5-5.5 pH tank, their was a few babies in the moss and they grew up fine in the tank. They both turned out to be males, but they lived for about a year or so in that tank as a test and did fine. As Jake said, start them off early in there so they get used to it. My babies I tried had to be a few days old at the most.