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Old 06/12/2021, 06:19 AM   #6
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Join Date: Jul 2010
Location: Austin, TX
Posts: 1,952
Something really likes it. Have you seen any change to the anything in your system? New or more sponge and/or more coral and/or algae? What was the test results when you tested 1 gallon of IO for phosphate? Have you done a side by side test of your salifert with a different test kit?

(Just FYI, I don't use skimmers since they skew the microbial populations in reefs.)

"Our crystal clear aquaria come nowhere close to the nutrient loads that swirl around natural reefs" Charles Delbeek
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