Hi! I have 2 adult apple snails, I kinda messed and was greatly missinformed about the ph lvl snails need. Well mistake fixed and all is well but... My female snails shell in the center is badly decentagrated but no snaily flesh is visable. I was wondering what I could do to help it grow back. If it can grow back. Anything I could feed em? I have some liquid calcium used for coral but im scared it my hurt my fish. Thanks for your time