Professional-Grade Reef Salt for Healthy Marine & Reef Aquariums

Create clean, consistent saltwater with Fritz RPM (Reef Pro Mix), a premium synthetic sea salt trusted by public aquariums, coral farms, research facilities, aquarium professionals, and reef hobbyists around the world. Manufactured in the USA using pharmaceutical-grade ingredients, Fritz RPM is formulated to closely replicate natural seawater while providing elevated calcium, magnesium, and buffering capacity to support thriving reef aquariums.

Each 55 lb box produces up to 200 gallons of saltwater, making it an excellent choice for reef keepers performing regular water changes or maintaining larger aquarium systems.

Unlike many salt mixes, Fritz RPM is manufactured in dedicated small batches to ensure exceptional consistency and purity. Every batch is tested for quality before leaving the factory, giving reef hobbyists confidence with every water change.

Key Features

• Makes up to 200 gallons of saltwater
• Premium reef salt for fish-only and reef aquariums
• Manufactured using high-quality raw materials
• Elevated calcium, magnesium, and buffering capacity
• Contains essential major, minor, and trace elements
• Nitrate, phosphate, and ammonia free
• Fast dissolving formula
• Consistent small-batch manufacturing
• Trusted by public aquariums and professional marine facilities
• Manufactured in the USA

Target Water Parameters

When mixed to approximately 35 ppt (1.025–1.026 Specific Gravity):

• Calcium: ~440 ppm
• Magnesium: ~1425 ppm
• Alkalinity: ~8.5 dKH
• Potassium: 400 ppm
• Strontium: 9 ppm

Perfect For

• SPS Reef Aquariums
• LPS Reef Aquariums
• Mixed Reef Systems
• Fish-Only Saltwater Aquariums
• Coral Grow-Out Systems
• Frag Tanks
• Public Aquariums
• Marine Research Systems

Mixing Instructions

For best results:

• Use RO/DI water whenever possible.
• Start with water between 70–75°F.
• Slowly add salt to circulating water.
• Mix with a pump and aeration until completely dissolved.
• Adjust salinity to 1.025–1.026 SG using a calibrated refractometer.
• Heat the mixed water to your aquarium's temperature before performing a water change.
• Allow approximately 2 hours before use once the solution is clear.

What's Included

• Fritz RPM Reef Pro Mix Salt
• 55 lb Box
• Makes Up to 200 Gallons of Saltwater

Why You'll Love It

Fritz RPM has earned a loyal following among reef hobbyists because it provides consistent water chemistry, mixes quickly, and supports healthy coral growth. Whether you're maintaining a mixed reef, an SPS-dominated system, or a fish-only aquarium, RPM helps simplify water changes while delivering the essential elements marine life depends on.

Why Buy from Infinity and Beyond Aquatics?

At Infinity and Beyond Aquatics, we carefully select trusted aquarium products that deliver reliable performance. Fritz RPM Reef Pro Mix is a proven choice for hobbyists looking for professional-quality salt with dependable consistency and excellent value.

Shipping Information

Large Shipping

Due to the weight of this item, it ships via our Large Shipping service. Orders are typically processed within 1–3 business days, and tracking information will be emailed once your order ships.