Hello,
I have historically struggled to keep phosphate below 0.15ppm (Hanna) even running HC GFO through a reactor. My nitrate usually measures around 1ppm (Salifert).
A few days ago, my phosphate was measuring 0.22ppm and my glass had algae, which is usually my indication to change out my GFO. For whatever reason, my HC GFO only lasts about a 7 days. I've been running GFO for about 5 months now and prior, my phosphate was very high, above the Hanna threshold. I had slowly brought it down using GFO. My hope is that my rock and substrate have released most of the bound phosphate but I can't be certain.
This time I tried to dose (on 2/15) a small amount of nitrate, using Seachem's Flourish Nitrogen product and did not change out the GFO. Tonight (about 36 hours later) I measured my GFO, and it's at 0.1ppm. Nitrate is still at 1ppm.
Am I correct to assume that the nitrate dosing brought down the Phosphate level?
thanks in advance,
Victor
I have historically struggled to keep phosphate below 0.15ppm (Hanna) even running HC GFO through a reactor. My nitrate usually measures around 1ppm (Salifert).
A few days ago, my phosphate was measuring 0.22ppm and my glass had algae, which is usually my indication to change out my GFO. For whatever reason, my HC GFO only lasts about a 7 days. I've been running GFO for about 5 months now and prior, my phosphate was very high, above the Hanna threshold. I had slowly brought it down using GFO. My hope is that my rock and substrate have released most of the bound phosphate but I can't be certain.
This time I tried to dose (on 2/15) a small amount of nitrate, using Seachem's Flourish Nitrogen product and did not change out the GFO. Tonight (about 36 hours later) I measured my GFO, and it's at 0.1ppm. Nitrate is still at 1ppm.
Am I correct to assume that the nitrate dosing brought down the Phosphate level?
thanks in advance,
Victor