White Sac/Lint looking things

[cupofjoel]

Ever since I started keeping female bettas I've noticed white sac/lint looking things on my glass. Is this due to the female bettas? I clean it off only to find it again a few days later. I've never seen this type of stuff on my glass with other species of fish. Thoughts?

 

[JuiceBox52]

Photos?

 

[cupofjoel]

 

[cupofjoel]

No one knows?

 

[JuiceBox52]

I dont. Someone else might. @Byron @Colin_T @Retired Viking