Tongue Is Red Help!

[Seansrl]

I picked up my leopard gecko from ++++++++ back in July. He is kept on eco earth with some caves made out of excavator clay. No lights just a heat mat under his warm hide. I was feeding him yesterday and I noticed his tongue was awfully red. I read somewhere it might be calcium deficiency but I don't understand how that would be possible when all of his food gets dusted. I'm really worried does anyone know what's wrong.

 

[acpart]

I've seen that in some of my geckos as well. It's fine. I don't think there's any way to diagnose a calcium deficiency (that I've ever heard of) by looking at the tongue.

Aliza