This depends of the type of collection but some general rules are important:
- easy access
- the information should be kept with the shell
- avoid direct sunlight
- carpeting avoids broken shells when dropped
- eliminate dust
- do not use acid wood
In conditions that combine a damp atmosphere, warmth and darkness, moisture can attack your shells. Of a particular type is "Byne's disease". Fortunately there are a lot of remedies and there is never reason for panic. Click images below to enlarge images.