[Dentoid]

Welcome to the Sanctuary Phil. Hydrometers are notorious for being inaccuarate. Check out Aquarium supplies for your tropical fish tank, saltwater fish tank, saltwater aquarium fish, freshwater aquarium fish & reef aquarium. Aquarium filters, aquarium lighting, aquarium tanks, protein skimmers & more for your reef tank. for an affordable refractometer. In the meantime, I'd average the two readings.