One of my baby swordtails is constantly hideing under the substrate and the other ones sometimes come down to peck him, he is very skittish as if he is going through some sort of mental trauma. I had to clean the breeder box he was in yesterday so he was caught and put into another container along with the 3 other fry who are fine. I added some substrate into the breeder box to stop them from escaping from the holes at the bottom, then I added the fry back in. They seemed fine then until this morning when I found one of them in such a terrible state. The temperature is 27.9 and everything else is fine. Any advice / suggestions would be greatly appreciated. Thank you.