ncy

Hello!

Can anyone tell me if it makes sense to estimate what the concentrations of K & P are by using my Nitrate readings as a reference point? i.e. if my nitrate concentration is 5ppm and I'm adding daily

.059 grams K2SO4 (Potassium Sulfate)
.065 grams KNO3 (Potassium Nitrate)
.06 grams KH2PO4 (Mono Potassium Phosphate)

Which is equal to (according to fertilator)

1.05 ppm Nitrate
0.11 ppm Phosphate
1.14 ppm Potassium

Can I deduce that I currently have approximately 5 times the daily addition of P & K? Or is plant nutrient uptake too unpredictable to determine from the nitrate reading?

Also,
On the Fertilator here at APC, are the numbers below the calculation boxes suggested guidelines for nutrient levels to maintain in the tank?