[header] How to feed tropical fish [title] Find out how your fish eat. [step] Different kinds of fish like their food at different levels of the tank. Their mouths are designed to approach food in a certain way, so you'll need to know their preferred way of feeding. 
Look at your fish's mouth to determine where it likes to eat its food. [substeps] Surface feeders have up-turned mouths for reaching up to the surface of the water.