Does my axolotl look healthy?

[Mash_01]

So, I noticed a lighter patch of skin just behind my axolotl's head and partially on her dorsal fin, and I am wondering if this is any indication of illness or just some pigment change as part of aging.
Any opinions?
If this is illness, any suggestions to rectify it?
I change half of her water out every week, and I have just started using prime chlorine and chloramine remover.

 

[Mash_01]

So, I noticed a lighter patch of skin just behind my axolotl's head and partially on her dorsal fin, and I am wondering if this is any indication of illness or just some pigment change as part of aging.
Any opinions?
If this is illness, any suggestions to rectify it?
I change half of her water out every week, and I have just started using prime chlorine and chloramine remover.

So, I noticed a lighter patch of skin just behind my axolotl's head and partially on her dorsal fin, and I am wondering if this is any indication of illness or just some pigment change as part of aging.
Any opinions?
If this is illness, any suggestions to rectify it?
I change half of her water out every week, and I have just started using prime chlorine and chloramine remover.