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[AGA Member] nutrition Test kits....
Amit Brucker asks: "Is there a way to measure nutrition deficiency?"
I use Hach digital Pocket Colorimeter kits: #46700-02 Nitrate;
#46700-16 Iron and #46700-06 Phosphate. Maintaining this range seems
to work: 10 - 20 mg/L Nitrate, 0.15 - 0.25 mg/L Iron and 0.5 - 1 mg/L
Phosphate. I use Kent Freshwater Plant (Fe, K20, Cu, Mn, Mo, Zn) and
ProPlant (N, B, Mg, S). I figure if my Iron and Nitrate readings are
OK, the other components are OK.
Story: Once a week I added 60 ml of both Iron and Nitrate to a very
brightly lighted heavily planted 125 gallon aquaria. Yet, plants showed
signs of nutrient deficiency every week and algae problems existed. Did
testing and discovered nutrients were used up half way through the
week. So, for a half a week they were starving! After reducing light
level by I/3 and thus reducing plant's metabolic rate, once a week
dosing of 15 - 20 ml of both Iron and Nitrate maintained acceptable
nutrients levels. Plants looked better and algae problems vanished.
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