A stripped down tutorial on how I clean shells in my collection(from Maine) using Bleach, Hydrogen Peroxide, and Acid Magic.
CLEAN SHELLS AT YOUR OWN RISK, and always make sure to protective personal equipment such as goggles and gloves when handling any chemicals.
Acid Magic information: https://www.microcare.com/MicroCare/media/Documents/AM-Acid-Wash-HTU.pdf
Acid Magic disposal: Dispose of ACID Magic according to all local, state, and federal regulations.