As an Amazon Associate, we earn from qualifying purchases. PM2 Salinity Module - Bulk Reef Supply Neptune Systems . 207495 Gallery Attributes Brand name, Manufacturer name, ManufacturerNeptune Systems Extra Product NamePM2 Salinity Module - 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, SKU207495 qtySourceupdateFromUrlEntry snippetWhy does BRS recommend this? Having the ability to monitor the salinity of your reef tank is a very valuable piece of information. Usually, if something is to go wrong with your tank, you will usually see a change in salinity from temp, to a top off unit being stuck on, if you have a Neptune Apex Controller we highly recommend investing in the PM2 module and salinity probe. Add the Salinity Module: PM2 to your Apex Neptune System. Real-time monitoring of salinity in reef aquarium Module has extra Temp Probe port I/O Switch Inputs for ATO, feed buttons, leak alarms, etc. Probe Sold Separately. Features of the Neptune Systems Salinity Expansion Module: Monitor/Control Conductivity/Salinity and temperature 4 Measurement ranges (0-900 uS/c tierPrice194.99 Distributor offers SellerSKUMOQIn stockMultiplePrices bulkreefsupply.com207495111 @ $94.99