I would keep an eye on them, also what is the temp in your tank, they are very picky when it comes to temps, that is why they are hard shippers. see what the diff is on your temp from day to night. if you have too big of a swing that may be affecting them as well
I've been watching them closely because I don't want them to harm anything else in the tank if they go south. Everything else look good in the tank. Temp is 81 with lights and 79 to 80 at night.