Keeping aquarium pets is a lot more work than some people expect. There’s a lot of cleaning that goes into keeping your tank-dwellers happy and healthy! So what happens if you start to get a weird scum on the surface of your tank water? Before you can fix the problem, it helps to know the cause. An oily film on the surface of the water could come from: Oily fish food. Some frozen fish foods are very oily, and can leave a residue on the water’s surface. Changing fish food brands may make a big difference! Oily people food. If … Continue reading →