My advice is to check the required "dwell time" for your UV
to function properly. All reputable UV
dealers list acceptable dwell times for their sterilizers. In a strange sense, slower flow is better for UV
because it allows them to sterilize more efficiently. Find the UV
unit's rated dwell time, compare that to your pump's rated flow rate, and adjust for other in-line flow obstacles (filtration, heaters, etc.). It never hurts to use too much UV
, so buy a unit that may be over-rated for what you're doing.