ATI Multi Standard is a high-precision seawater reference solution used to verify and calibrate aquarium test kits and salinity measuring devices. It contains fixed concentrations of salinity, carbonate hardness, calcium, magnesium, potassium, and strontium, providing an accurate benchmark for reliable testing. Based on ATI Absolute Ocean, it precisely replicates natural seawater and is quality-controlled in the ATI laboratory for consistency and stability.

Why It’s Important

Accurate testing is key to maintaining a healthy reef aquarium. Over time, test kits and measuring devices can drift, leading to incorrect readings. ATI Multi Standard provides a trusted reference point to ensure your results remain precise and dependable.

Specifications

• Reference Values:
• Salinity: 35 PSU
• Carbonate Hardness (Alkalinity): 7.5 °dKH
• Calcium: 421 mg/L
• Magnesium: 1,313 mg/L
• Potassium: 408 mg/L
• Strontium: 8.1 mg/L
• Form: Liquid
• Available Sizes: 1000 mL

Instructions

• Shake well before use.
• Use to verify or calibrate test kits and salinity devices.
• Close the bottle immediately after use.

What's Included (i.e., what’s in the box)

1. ATI Multi Standard – 1000 mL