saw thison amazon and was curious about its use in hydroponics would this be beneficial to prevent algea or waste of time and money
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I believe that @ReikoX uses UV light in his reservoir. That’s a good indicator.
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I started using one very similar to that in addition to regular treatment s of chlorine. As far as does it work, I guess time will tell.
I have seen many folks adding UV to their rez to help prevent problems.
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Yes, but my resivoir is just RO water. 
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