how important is low nitrate and phosphate in my QT? I know that ammonia is a must to monitor and alkalinity is important, but I'm curious about the other elements. Thanks for the help.
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For fish, all you need to worry about are ph, salinity, and ammonia. For corals, in addition to the above, you need to worry about others such as phosphate, nitrate, magnesium, kh, and iodine.

