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Salt & Hydrometers

Marine Salts for Marine Aquariums, Freshwater Salts for Healthy Fish and Hydrometers are used to test concentrations of salt and other soluble chemicals in your Aquariums. A hydrometer is an instrument used to measure the specific gravity (or relative density) of liquids; that is, the ratio of the density of the liquid to the density of water. We stock a variety of Marine Salts, Freshwater Salts and Hydrometers ready for next day delivery.

 

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