It’s the only way to keep your fish. Prevents freezer burn for up to a year. Clean fish as normal, rinse and let dry on paper towels so moisture doesn’t get ‘sucked’ out and prevent bag from sealing along the heat strip. Any average sealer is fine, no need to get expensive one. Mine is 8 yrs old from Gander Mtn. Use 11” wide bags that come in the bulk roll that you can cut to size. Saves tons of space in freezer over freezing filets in water.