I dont mean to be thread crapping or anything, but I just noticed the same thing in my tank today also. I have turbo snails, and I just looked at them in the microscope and they are kinda spiralish, havent touched them so I dont know if they are hard or not, but are these eggs or something bad? Do I have to worry about them hatching and having like 100 snails in my 20 gallon tank? lol.
Sorry to post this in someone elses thread, but this seemed like as good of a place as any.
Thanks in advance for any help.