Oil film in betta breeding tank

How can I get rid of oil film on the surface of the water. I know oil film can kill betta fry so easily and they just laid the eggs. I need to know quickly. Thanks

 

Put a air stone in there or you can lay a paper towel flat on the top and it will collect it. The air stone works best.

 

Put a air stone in there or you can lay a paper towel flat on the top and it will collect it. The air stone works best.

Can't use an air stone bc there are eggs but I will do the paper towel. Thank you

 

Can't use an air stone bc there are eggs but I will do the paper towel. Thank you

whats the size of the tank? you could place in the corner and the airstone will do its job on low flow. good luck my friend

 

whats the size of the tank? you could place in the corner and the airstone will do its job on low flow. good luck my friend

I fixed it with the paper towel actually but thank you so much