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Tank suffered an ostreopsis outbreak yesterday despite of the 55W UV sterilizer. I have to vacuum twice a day just to deal with it. Now I am not so sure about the UV sterilizer effectiveness and H2O2 either.
I think I'm going to try a different route: foster copepods to thrive and hopefully they will eat it all. I have switched the skimmer off, no phosguard, no GAC and lots of food and phytoplancton (nannochloropsis, isochrysis and tetraselmis)
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