Using Fertilator, I can see that 1/2 tsp of CSM+B will add 0.14 ppm Fe per dosage. And according to Fertilator's Conversion of tbs/tsp/Dash/Pinch/Smidgen/grams, 1 tsp is about 5ml. But referring to the above dosage by John N. , where does that 30ml (in braces) comes from?100 - 125 Gallon Aquarium
+/- 1 1/2 tsp KN03 3x a week
+/- ½ tsp KH2P04 3x a week
+/- ½ tsp (30ml) Trace Elements 3x a week
50% weekly water change
Please advice. TIA.