Take the guesswork out of mixing reef water with Fritz PRO RPM Reef Pro Mix. This professional-grade marine salt blend is formulated for reef aquariums and fish-only saltwater systems, providing the major, minor, and trace elements needed to support healthy marine life.

This convenient box contains four individually sealed 13.75-pound bags. Open only what you need while keeping the remaining salt protected from moisture—perfect for aquarists who want the value of a large box without repeatedly exposing the entire supply.

WHAT’S INCLUDED

• Four individually sealed 13.75 lb bags
• 55 pounds of salt mix total
• Makes approximately 200 gallons at standard marine salinity

KEY BENEFITS

• Complete marine salt mix for reef and fish-only aquariums
• Individually sealed bags help protect unused salt from moisture
• Enhanced calcium, magnesium, and potassium levels
• Buffered for stable pH after mixing
• Free of nitrate, phosphate, and ammonia
• Small-batch manufactured and quality tested
• Ideal for routine water changes and new aquarium setups

TYPICAL PARAMETERS AT 35 PPT / 1.025 SPECIFIC GRAVITY

• Calcium: 440 ppm
• Magnesium: 1,425 ppm
• Alkalinity: 8.5 dKH
• Potassium: 400 ppm
• Strontium: 9 ppm

MIXING INSTRUCTIONS

Use RO/DI water with a TDS below 10 ppm—0 ppm is preferred. Bring the water to approximately 70–75°F and slowly add the salt while circulating with a mixing pump or air stone. Adjust to your desired salinity between 28–35 ppt, or approximately 1.021–1.026 specific gravity.

Once the salt has dissolved and the water is clear, heat it to the temperature of your aquarium. Allow the mixture to circulate for at least two hours before completing a water change.

Never add dry salt directly to an aquarium containing livestock.

This is a heavy item and ships using our Large Shipping rate. Additional handling time may be required. Salt mix is packaged by the manufacturer in four individually sealed bags inside the outer box.