ID needed please

[electrocuted]

I noticed all of these sacs after 1 night. They have not grown or changed in 4 or 5 days. Does anybody know what these might be? There are a total of 11 of these sacs, all individually stuck to my glass, all on one side of my tank. Also, you really can't tell from the pix but these sacs are flat or thin, not spherical.
Thanks for any ideas.

 

[electrocuted]

another pic

 

[organism]

dunno, white flatworms, maybe
do they move?

 

[electrocuted]

No, they do not move at all. I don't know whether or not I should remove these things.
What do you guys think?

 

[dea_mt]

look like some kind of eggs to me!!!

 

[electrocuted]

Here is another post with a better picture of the same problem.
https://www.saltwaterfish.com/vb/show...19#post1142019