what are those ? limpets like

[Kinghermit]

Hello, i have those strange white moving spot on my tanks, they are def not pods, cant find anything. here is a short hyperlapse where you can cleary see them.
<iframe width="560" height="315" src="https://www.youtube.com/embed/wuE9LPWuGDQ" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

 

[Anemone]

If you're talking about the things on the glass, not enough detail to tell what they are. Sorry.

Kevin