Most of my nerite snails have chaged color patterns in my tanks since I've bought them.
My zebra's stripes have changed directions, the green horned nerites have a marbled color to the new growth, the coronas have lost a lot of the black on their new growth and one now has a yellow/black marbled look to it on the new shell area.
What causes this? Just drastic differences in water and diet from the person I bought them from?
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