We are new to snails, so I’m not sure if this is normal or not. We got three of these little guys from our local pet store. We cycled our planted tanks for several months and made sure water levels are where they should be before adding them. All of them are showing signs of new growth, but this little guy looks a bit different. His shell is see through a bit towards the top and that dark section towards the bottom looks like gravel stuck in his shell. Is he ok? Do we need to try and get the gravel out? He has great energy and appetite, so we aren’t sure if he is healthy or sick. We’ve had them for about a week. We are going to start feeding them some blanched zucchini to help with calcium. Any suggestions/advice would be great. Thank you all!