Aquarium: Thermometer & Hydrometer Limited Range Specific Gravity Meter. For Marine Aquarium Use. Ideally suited for use in nano tanks, smaller setups or sumps of larger systems. Accurate to 0.001 specific gravity && salinity (PPT) measurements. Durable construction for extended life. Designed to give a temperature-corrected reading in warm water aquariums - 68 F to 85 F (20 C to 30 C). Readings can be taken by taking the meter out of the aquarium and placing on a level surface or leveling the unit in the substrate of your sump where its less likely to be impacted by marine animals.
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