Is that Fungus?

Is that Funguson my red slider? It has cotton wool white riffs on its shell and underneath it. Eating well and active.
If it fungus, any home remedy?
*admin-edited link
Turtle Talk
https://mail.redearslider.com/forum/
https://mail.redearslider.com/forum/viewtopic.php?f=4&t=39199
