In my 5.5 G betta tank there is a weird film on the water surface. Kind of like when you make beans, they’ve been sitting out for a while, someone gets more and you can literally peel back the surface. It’s like that except it’s not a thick and it flakes. I don’t know how else to describe it. So I scooped off the surface water yesterday and replaced it with new. Now it’s back. Sorry for bad pics. Second one is when I run my finger through water. Does anyone know what this is? Thanks!