need help with uv sterlizer?

uv sterlizer on powerhead how is that need more explaintion that the directions on the paper can someone help me please i just got it and don't understand how the uv goes to the powerhead? AQUACLEAR 402 AND U.V STERLIZER DOUBLEHELIX 9 WATT
U.V DIRECTIONS- I PUT THE TUBES TOGETHER AND THE HOSE CLAMPS THEN IT SAY'S NEXT PLACE ONE END OF THE TUBE OVER THE END OF YOUR POWERHEAD OR PUMP AND ONE END OF THE TUBING DIRECTLY IN THE AQUARIUM OR SUMP.WHAT IS THAT SUPPOSE TO MEAN IF ANYONE HAVE A AQUACLEAR 402 WHERE DO THE TUBE GO? <img src="graemlins//urrr.gif" border="0" alt="[urrr]" />
 
Top