Oil

[Tropjunky]

Does any1 know if oil can harm ur fish?

 

[SirMinion]

Oil on the surface of the water will prevent oxygen from dissolving in the water.

Yes, oil on the surface on the water will harm your fish.

 

[Fish Buddy]

Why, do you have oil on your tank's serface?

 

[IBFrog]

Oh yes. I do not know why or how you got oil on the water, but get it off.

 

[Wyld-Fyre]

If you're feeding your fish certain types of foods you'll get that oily film on the waters surface. I think that's whats causing it right?