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How fast should a turtle grow?
Bowser (female) was just under 4 inches when we got her 5 months ago, and now she's close to 6 inches.
Just curious.

seems like the growth pattern is just fine. since shes female she should be growing at about that pace.

Also check the seams and shell for steady growth. An inch growth for a RES that's 4" in 5 months is a little fast than what I would expect but pretty normal.