12-25-2020, 07:05 PM
Join Date: Mar 2008
Location: Groveport, OH, USA (recently moved here from Texas)
iTrader Positive Rating: 100%
The UV filter isn’t a “filter”, but if you already weren’t using one, it should not matter. That said, once it kills the green water algae, you will want to do a water change I think. It will do the job of killing the green water algae, as well as any other floating pathogens.
I dose EI and also run a UV sterilizer in my 29 gal, and have not noted any bad effects.
My only caution would be, if you haven’t been using filtration in a natural tank, an in-tank UV will produce significant flow, which may stir up sediment, which may lead to other short term issues (solves by a water change).