Maybe you dont notice, the eggs are small white and coated in clear goo, very sticky. But not all snail eggs look like that, those are just what the eggs looked like with my snails which ive gotten rid of because i couldnt find any info on them and i didnt intend on having them they just came in with my plants.
Look around the tank for small snails, im sure over time they will multiply.
- depthC