No problem as far as I am concerned. Free nerite snails are a plus.
There's lots of little free swimmers that will hatch out and swim around from the eggs within the capsules you see, I have noticed that when they hatch, the front of the capsule opens like a hatch door.
There's going to be about 30 eggs per capsule, if indeed these are nerite eggs.
Here is a link with pics so you can see if yours match up!
Hope this helps