Cora life's Hydrometer takes a true water sample at six inch depth. Easy to read and accurate this specific gravity meter is designed to give temperature-corrected readings in warm water aquariums. Includes a self-leveling hanging device and allows your hands to stay dry avoiding contamination of aquarium.
Coralife is one of the market
Quantity
Goes well with this item. Each is the same price as on its own page.



