Jan 10, 2018 #21 becks Well-Known Member View Badges Joined May 22, 2016 Messages 815 Reaction score 546 Rating - 0% 0 0 0 Ca, alk and mg Every two to three weeks and my levels are same. (Doser) Nitrates, every few months and always reads around 2.5ppm Po4 never, I find the colour chart hard to read with Salifert
Ca, alk and mg Every two to three weeks and my levels are same. (Doser) Nitrates, every few months and always reads around 2.5ppm Po4 never, I find the colour chart hard to read with Salifert
