Identify these please (1 Viewer)

[alstang1]

Can anyone identify what’s on my glass. They have showed up every day for almost 2 weeks. I scrape them and they come right back. Very similar design each time. I’m thinking snails.

 

[sneezebeetle]

Looks like Collonista Snails to me.

 

[alstang1]

Looks like Collonista Snails to me.

Researching collonista snail it repeatedly suggests a nocturnal creature. These guys are on the glass all day long every day. Is that still a possibility?

 

[Tangs]

Looks like what I had a couple of years ago. I do not have them now. I think they went away about the same time I switched from using city carbon filtered water to rodi.