[shell damage, how to add calcium?]

I was at Petco picking up a check valve and saw that they were selling rabbit snails so I picked one up, of course it's not in that great of shape and has some shell damage. What should I do to help prevent more damage to the shell? I already feed my snails tums and vegetables every other week. 

[Guppy hasn't grown, runt of the litter type of deal or dwarf?]

On 8/28/2021 at 9:57 PM, PineSong said:

Do you have a photo? Do you know what kind of guppy he is supposed to be? Maybe he's an endler or endler mix?

Thats the best photo I could get, I have no idea hot to tell if he's a mix

[Guppy hasn't grown, runt of the litter type of deal or dwarf?]

In my 10 gallon tank I have shrimp and 6 male guppies I bought back in March from Petsmart, 5 out of the 6 have grown a lot and have big bellies and fins. This one guppy hasn't grown at all in size, except his belly, fins are still short. I was wondering if there are dwarf guppies or if he just got bad genes and is small.