he doesn’t regard UV-B lighting as necessary but recommends broad-spectrum lighting . Quote from the care guide . Also unlikely to cause it in such a short timeAdminstraation has just brought this to my attention. I hope you find it helpful
https://www.monsterfishkeepers.com/forums/threads/fly-river-pig-nose-turtle-care-sheet.16611/
TOTALLY forgot about Mercury Vapor bulbs.....by FAR the best choice in UVB/Heat combo