UV: What Exposure Level For Ich?

[Kengar]

What exposure level should I be shooting for for ich control with UV? Full out 90,000 mWs/cm2 ?

 

[downhillbiker]

i have been trying to find a chart to show flow rates, wattage, and length of unit, so i can figure out my exposure.

but i run 36w with 350 gph on a 72 gallon tank and have no ich.