RPM Part 1, 2, 3 - Fritz Aquatics

Achieve balanced, stable reef chemistry with the Fritz RPM 3-Part Supplement System—trusted by reefkeepers and professionals alike. This complete solution includes Part 1 (Alkalinity), Part 2 (Calcium), and Part 3 (Magnesium), each formulated with ultra-pure ingredients for consistent results and a clean ion profile. When used together, they provide the critical building blocks for coral growth, coloration, and overall system health.

At Top Shelf Aquatics, this is the same trusted 3-part we rely on in-house for our coral systems and aquaculture operations.

System Includes:

• Part 1 – Alkalinity: Pure carbonate and bicarbonate blend to maintain 8–11 dKH and support pH stability.

• Part 2 – Calcium: High-purity calcium chloride to maintain levels between 400–450 ppm, fueling skeletal development.

• Part 3 – Magnesium: Balanced magnesium chloride and sulfate mix to stabilize calcium and alkalinity uptake, targeting 1280–1400 ppm.

Why We Use It:

• Supports vibrant coral growth and healthy invertebrates

• Avoids unwanted trace elements or heavy metals

• Fully compatible with automated dosing systems

• Safe for all reef livestock

• Precise, measurable results with reliable test kits