Nerite Snail Shell Growth

[dialicious]

Maybe 9 months ago I grabbed a striped nerite for my 7gal planted.
He's been going along, doing his thing, being happy and snail like. Now, I've noticed a distinct change in his shell pattern. From fine, straight lines to radically thick squiggly bands. The two colors are seperated by a ridge in his shell.

I'm guessing it's the change in diet? He's eating algae and two different brands of wafers.
He's massive now, so I know he's not starving...

Any other guesses as to why the change?

[msjinkzd]

have you had any temperature fluctuations in your tank?

[destined_love7]

It needs calcium. That could be what's causing this. Msjinkzd posted some great recipes.

[dialicious]

Nope, temperature has been really stable.
But calcium problems? That would make sense. Special snail food it is!

[destined_love7]

LOL. I've finally decided that my brigs don't like the fruity baby food (for the snail jello). So I'm gonna stick to the veggies (baby food).