Neptune Systems Conductivity Calibration Solution 53000 Microsiemens pond algae Add directly to the marine Volume Guide Add directly to the marine aquarium as required to maintain coral growth Cat’s Weight (kg)Intact Maintenance (g day)Neutered Maintenance (g day)Weight Loss (g day)1–230–5020–40—2–350–6540–55—3–465–8055–65—4–580–9565–80—5–695–11080–9565–806–8110–13095–12080–958–10130–150120–14095–110 53000 µS Conductivity Solution Used for calibrating conductivity probe for saltwater 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