miggs76 February 6, 2014 Share February 6, 2014 I am wondering if there is a best time of day to do nitrate and phosphate tests. Earlier in the week I did a phosphate test at about 8pm using my hanna ULR tester and got .17, then a few minutes later I got .16 I thought this seemed high, which is why I repeated it. The next morning, I did it again, only this time I got .06, which is what I am used to--and even repeated the test and got virtually the same reading. I guess I got the higher reading because a few hours before I fed some frozen foods. I emphasize it was a few hours before, not a few minutes before. Is it best to do your tests in the morning after the skimmer has had all night to export nutrients? Would this time period most accurately reflect the numbers in the tank? Link to comment Share on other sites More sharing options...
Jon Lazar February 6, 2014 Share February 6, 2014 I would pick a time that's convenient for you, and do your tests then. Trends over many days are more important than changes throughout the day, IMO. Link to comment Share on other sites More sharing options...
gmerek2 February 6, 2014 Share February 6, 2014 The best time for me is when I have a beer in one hand. Link to comment Share on other sites More sharing options...
Dell2go February 6, 2014 Share February 6, 2014 the best would be when all the lights are on, especially day light. Link to comment Share on other sites More sharing options...
zygote2k February 6, 2014 Share February 6, 2014 The same time. Link to comment Share on other sites More sharing options...
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