[header] How to grill tilapia [title] Select the tilapia from your local butcher or grocery store. [step] For optimal grilling, each filet should be at least 1 inch (2.54 cm) thick. Look for fillets that have brightly colored skin, clear eyes, clean gills, and very little " fishy " odor. 
If you are purchasing filet, make sure there is no excess water in the packaging. Press against the flesh of the filet--it should be firm and spring back quickly.