UBV
I just got a 46 gallon tank today and at the store, the manager told me that turtles that are over 4 inches usually don't need UVB anymore. Is this true? 
Turtle Talk
https://www.redearslider.com/forum/
https://www.redearslider.com/forum/viewtopic.php?f=15&t=7514
respeanut wrote:I just got a 46 gallon tank today and at the store, the manager told me that turtles that are over 4 inches usually don't need UVB anymore. Is this true?
grey goose wrote:Go back to the store and slap him on the back of the head for me. RES need UVB to synthesize vit D3 at the least........among other things. All their lives.