Pondmaster 40 watt UV Clarifier (MPN 02940)

Pros: Tremendously effective

Cons: Questionable durability

Despite problems with my previous unit of the same model, I decided to give this another try, mostly because unlike most UV lights it is submersible, which makes installation a lot easier for me. The performance when working is unquestionable. Despite not being rated for my 7000+ gal pond it nonetheless cleared murky brown/green water you could barely see the fish through in about five days to where I can clearly see small objects on the bottom. Algae cleaners, barley solutions, none of that stuff was effective and is an ongoing expense. This is a miracle cleaner. I rather crudely hooked it up, feeding directly into it from a Laguna 4200, and then into the bog filter. Since the flow rate of that pump is too high I partially closed an in-line valve to get the flow down to the 3000gph or less for the light to be effective, so water wouldn't flow through too fast. The reason I rate the quality down is my first unit bought a few years ago was tempermental, with the light keep going out, which was a PITA as I kept pulling it from the pond, re-assembling, and it would work for a bit. Turns out it was a bad ballast, a common problem with these. Pondmaster replaced with a new unit, but then it somehow had a water leak into the ballast after a while, possibly my fault, and I just ran without it for a long while, but got tired of pea soup and decided to try a new one. Hopefully this holds up better, but it sure works great when it runs..

Submitted by xdmfan on 05/21/2020 09:32:32 AM.