MasterLine II — Concentrated Macronutrient Formula
Built for high-demand planted tanks. MasterLine II delivers a concentrated blend of Nitrogen, Phosphorus, Potassium, and Magnesium — the four essential macronutrients for healthy, harmonious plant development in fast-growing, densely planted aquariums.
Key Features
- N, P, K & Mg — complete macronutrient coverage in a single formula
- High-demand formulation — designed for Dutch-style tanks and aquariums with dense planting and fast growth
- Precision dosing — ideal for aquarists who dose macro and micro nutrients separately for full control
- Promotes harmonious growth — balanced macros support even development
| Macronutrient | Concentration |
|---|---|
| Nitrogen (N) | 100 ppm |
| Phosphorus (P) | 50 ppm |
| Potassium (K) | 150 ppm |
| Magnesium (Mg) | 20 ppm |
FAQ
What is the recommended dosage for MasterLine II?
Please contact customer service
Can MasterLine II be used with micro nutrient supplements?
Yes, MasterLine II is designed for use with separate micro nutrient supplements to allow precise control over nutrient dosing.
Is MasterLine II suitable for beginners?
Please contact customer service

Grace Abraham –
My planted tank has grown much more evenly since switching to MasterLine II. The plants are greener and more robust, especially in the back and middle layers. I use it with a micro supplement and find the dosing very manageable.
Adrian Walsh –
Works well in a dense Dutch-style setup. The growth is balanced and plants don’t show signs of nutrient deficiency. I appreciate the clear macronutrient balance in the formula.
Owen Alsop –
After a few weeks, my anubias and java ferns have developed stronger leaves. The magnesium content seems to help with leaf color and structure. I mix it with my micro nutrients for full control.