Redfield ration calculator

This calculator helps you determine and regulate Redfiled Ratio of phosphor and nitrogen to avoid of algea. Ideal Redfield Ratio is N:P 16:1.

NO3
:
PO4

Volume of water in your tank [l]

Actual N:P ratio
N
:
P
Add KH2PO4 or KNO3 fertilizer to get ideal Redfield ratio N:P 16:1:
KNO3 [g]
:
KH2PO4 [g]