I'm telling you this as honest as can be. A complicated and varied diet and UV lights are unneeded. Musk and mud turtles do not require UVB, its the common sliders and other basking turtles that people THINK need uvb. A balanced, steady diet and a correct temperature range will ensure no metabolic bone disease or similar disorder does not happen. If you would like, I have references. No, those referances are not 20-year old outdated turtle care books from the 1970's, probably what most people read about turtles. Anyway, are you TRYING to waste your money? More variables means more chances for something to go wrong. If youre deadset on getting UV, go ahead and waste 50 bucks instead of the 5 you really need. Your turtle couldnt care less. Whats really questionable is how youre set up. That makes all the difference. Can you explain you setup? Sorry I don't have time to go look back and see if you already did.
Don't cuss please, just because I forgot what kind of turtle you have doesn't mean I don't know what I'm talking about.