As an Amazon Associate, we earn from qualifying purchases. Neptune Systems Conductivity Calibration Solution - 447 Microsiemens - Bulk Reef Supply Neptune Systems . 207522 Gallery Attributes Brand name, Manufacturer name, ManufacturerNeptune Systems Extra Product NameNeptune Systems Conductivity Calibration Solution - 447 Microsiemens - Bulk Reef Supply extendedQty, qtyInStock0 keywordssaltwater aquarium supplies, reef aquarium supplies, marine fish tank, live rock, GFO, protein skimmers, two part dosing, aquarium carbon, fish food, RO/DI Systems, ecotech marine, aquaillumination, neptune systems, kessil, innovative marine moq, multiple, tierMinQty11 MPN, SKU207522 qtySourceupdateFromUrlEntry snippet447 µS Conductivity Calibration Solution - Use this calibration solution to calibrate your Conductivity Probe and PM2 module for RO/DI water quality and other freshwater applications. Conductivity probes can be used for many different functions from letting you know the salinity of a tank to the quality of RODI water. We suggest calibrating conductivity probes once every 3-6 months to keep readings reliable. 447 µS Conductivity Solution - Used for calibrating conductivity probe for freshwater applications. 53.0 µS Conductivity Solution - Used for calibrating conductivity probe for saltwater applications. tierPrice12.99 Distributor offers SellerSKUMOQIn stockMultiplePrices bulkreefsupply.com207522111 @ $2.99