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My turtle's shell is soft. Is it a vitamin D or UVB light issue?

Updated On September 23rd, 2025

Hello,I'm worried about my turtles health. This one particularly. I got them about 13 months ago ,they were the size of dollar coins. they also have a Basking light. I have put them in sunlight but that stopped about 3-4months ago cause it's getting cold. i want to know if his shell is supposed to look like this. I've posted a question before but I can't see it at all

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1 Answer

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Answered By Todd Cecil

Veterinarian

Published on February 24th, 2019

Thanks for reaching out about your turtles and including photos. Not sure if a lesion is recognized on the photos. Is the shell soft and bulging slightly? If so a calcium or vitamin D deficiency should be considered. Basking lights need to contain UVB radiation, and often that wavelength burns out in 6-8 months, even though the bulb continues to produce white light. If you have further concerns, a veterinary visit is recommended. Good luck.

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