We took a number of trips all over the place- Connecticut is a standard every summer, and we've been to Florida and Maine. As a result, I've collected many seashells. I have a number of HUGE clam shells (well, not HUGE, but around 5 inches wide at the widest point), a few medium sized ones, and a few scallop shells that are pretty large (Around 3-4 inches wide).
I was wondering, if I soak them in hot water and then rinse them really well, could I use them in my fish tank? I was thinking about getting some non-toxic hot glue and gluing a sea castle for Mister Fishy that's made out of seashells because we have so many. Other reason I want to do this is it sticks with the natural theme of my tank, something I want to do.
I would only use the smaller clam shells and the smaller scallop shells, and I may use some little shells as well to build him something to hide in.
So, is it okay to use them if I soak them really well, and if it is, what do you recommend doing to get them clean enough to use in the tank?