I know this is a bit of a stretch, but I thought perhaps someone else may know what this is. It's about a millimeter in diameter, or slightly less. I noticed 4 of these on the glass a few days ago, although now there's only one. I'm thinking my copperband butterfly ate the other 3. To me they look like eggs, with the likely source being one of the various snails in my tank.
I'm also fighting a sometimes losing battle with a variety of flatworms, but I don't know if they lay eggs. My flatworms are red planaria, though some look a little bluish, with various shades in between.
I'm also fighting a sometimes losing battle with a variety of flatworms, but I don't know if they lay eggs. My flatworms are red planaria, though some look a little bluish, with various shades in between.