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- Oct 25, 2016
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You should really seek out the manual for your make and model of UV sterilizer. The actual amount of UV exposure varies between makes/model (even of the same wattage) because they are of different lengths and varying quality of quartz sleeves. To sterilize dinos, you should be targeting between 60,000-90,000 uw/cm2.RedSea 260 Max E/69 gallons. 28 watt UV running slow flow
Was your experience referencing ovata species?
Here's an example from the Aqua Ultraviolet Classic manual. For a 25W unit, you should be targeting a flow rate between 400-600 gph. You could go less than 400gph for dinos, but make sure your particular unit doesn't have a minimum flow rate to keep the quartz sleeve and bulb cool.
UV is a great tool when used correctly. If your flow rate is not correct and too fast, your UV will be acting simply as a clarifier and not help you with your dino problem.
Edit: One other thing, you should be sure that the flow rate is enough to turn over the tank volume by at least 2.5-3x per hour. If it doesn't, that means your UV unit is undersized for your needs.