This is the 1 tier, 3 spray nozzle. This provides a medium pattern and is best for windy areas and shows up well at night with the additional light kit and does not clog in "murky" water. Special 1-tier nozzle ($29.95)
3 tier - 17 spray nozzle. This is the standard nozzle provided with the kit. It provides a wide pattern (about 16' diameter). It is best suited for ponds with light to moderate winds and ponds with relatively clean (swim-able) water conditions. Extra (or replacement) Standard 3-tier nozzle ($29.95)