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i would..... just for piece of mind man , i added a 25 watt uv to my setup and have not looked back !! , but i have adopted the qt practice as well , which does not hurt !!

for a 180 a 25w would be great , but you might get away with a 18w ? its all about the flow rate of your sump , thats what kills the bad stuff

good luck [email protected]!
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