New to reefing.

[Whatigot]

you can add shells toy our tank, sure.
But, hermits are really finnicky when it comes to their homes.
I have a TONNE of shells in my 72 gallon reef, like 10 per hermit of all shapes and sizes and my hermits still prefer to take the astraea and margarita shells.
I guess maybe it's something about a fresh shell versus one that is "used".

I used to think it was funny, but with snails costing between 2 and 3 bucks a piece and hermits not even being a neccessary addition to a clean up crew they have lost their humorous appeal.

[BigA]

That definitely will add up after some time. With the cost of livestock, any dollar that can be saved by not having to replenish snails is a good thing.

[ElGuappo]

i think the fresh water shells are to soft/brittle for their liking. i have some, one is currently being used but he shaped it to fit by breaking all the weak parts off.