Macro Mix (NPK) Macronutrients are those nutrients which are needed by the plants in relatively large amounts. The key nutrient elements in NPK are
Nitrogen(N), Phosphorus (P) and Potassium (K).
LCA's NPK may be used alone or in conjunction with LCA's Micro Mix. Best results are obtained when both are used. Full 3x per week dosing provides enough macro nutrients for even the most demanding tanks.