I don't think adding more Prime will detoxify nitrates.
What livestock is in the tank you may not want to drop NO3 too quick.
What is the cause for high NO3, overstocking or accumulated dosing?
You could always make a nitrate free macro solution.
What livestock is in the tank you may not want to drop NO3 too quick.
What is the cause for high NO3, overstocking or accumulated dosing?
You could always make a nitrate free macro solution.