Fish Tank Film On Surface

have an oily looking film …?

on the water surface of my tropical fresh water fish tank is this a sign that i have to do a partial water change…thanks in advance…

You’ll find this in many aquariums, it’s caused by feeding food that is high in protein, such as catfish pellets. Increasing water movement can help and you can also skim it off using a piece of grease-proof paper.

Great White Shark attacks and sinks dive cage with divers inside- Scary!