Fish Addict

I have noticed that recently 1 of my two apple snails has been hiding in its shell a lot. It usually comes out in the morning, then goes in and stays for the rest of the day. Why would this be happening? Could it be from my Rid Ich, even though I stopped using it a while ago, and have been using carbon and doing wc's...
My other one has been doing fine...

TFA101

i noticed this in one of my other snails i used to own, a black mystery snail. he showed this behavior before he died. Your snail's probably gettin' old. Either that or the medicine might've had some kinda impact