The Fauna Marin Multi Reference Solution is a vital tool for ensuring the accuracy of your home testing kits in saltwater aquariums. This solution provides precise reference values for essential water parameters such as calcium, magnesium, potassium, salinity, alkalinity, strontium, nitrate, and phosphate, allowing you to calibrate your test kits accurately. Each batch is meticulously quality controlled and tested using advanced ICP-AES technology at Fauna Marin's Seawater Research Laboratory, ensuring reliable results every time. This product is ideal for aquarists who need to verify unexpected test results or recalibrate old test kits, making it an indispensable tool for maintaining the health of your reef aquarium.