Ideas on getting nitrates up

[Myka]

Originally Posted by Ryanerickson

This is interesting as I have the exact issue zero nitrate and phosphate always .03-.07 by the way Hanna is your best bet for nitrate test kit screw the color matching game.

Hanna doesn't make a checker or photometer that is seawater compatible. The instruments can't "see" through the high TDS of seawater.