Neptune Systems Probe Calibration Fluid Kit (KIT OF 5)
If these are out of stock that means they are still back-order from Neptune direct, we have the calibration fluid as single kits. Here are the links:
The Neptune Systems Probe Calibration Kit includes everything you need to calibrate your pH probe and salinity probe for reef tank conditions. The single-use packets make calibration procedures easy and only requires clean water to rinse the probe between calibrations. Neptune Systems uses only quality ingredients when producing their calibration solutions ensuring accuracy.
Includes: Calibration 7 & 10 and Salinity Calibration Solution