I use powdered ammonium chloride to raise the ammonia to about 2-3ppm, then I swish some old filter media around in the water near the intake, or hang it in a mesh bag. Personally, I need to see the test results change with my own eyes so I can know it's really cycled. The ammonium chloride is great, you can buy a pound of it for a few bucks, and that's enough to cycle every tank you'll ever have for the rest of your life probly. There's really no reason to use fish to cycle a tank.