A little more information is needed by these fine folks to give you a truely educated answer.
You say your nitrates are a little high. What is the measurement?
Your water is fine? What are the parameters?
Objective measurements are better than subjective descriptions.
Just trying to help.
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Of course I could be completely mistaken.
Ed: "I hate to tell you this Dr., but there aren't any fish in that river. In fact, there isn't any river."
Dr. Lao: "That's ok. Me no use bait."
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