AQUA CRAFT Marine Environment Hydrometer :

The first, most important, not often performed and easiest test for all marine aquariums. SPECIFIC GRAVITY TESTER™ is color coded, easy to use, durable and accurate.

BOYU Digital Thermometer (Battery Operated) : Aquarium thermometers are an inexpensive necessity! Always use one and avoid major problems. Indoor temperatures fluctuate by time of day and season - even when controlled by the thermostats on your central air, aquarium chiller or aquarium heater, something can always go wrong and you need to know immediately. Aquarium thermometers are hardy, reliable devices you can entrust with the safety of your aquarium.

Glass Thermometer (Hanging Type) : Aquarium thermometers are an inexpensive necessity! Always use one and avoid major problems. Indoor temperatures fluctuate by time of day and season - even when controlled by the thermostats on your central air, aquarium chiller or aquarium heater, something can always go wrong and you need to know immediately. Aquarium thermometers are hardy, reliable devices you can entrust with the safety of your aquarium.

ISTA Hydrometer :
● Provide precise salinity reading.
● Easy in operation and salinity reading.
● Smooth water flow design prevents the attachment of fine bubbles to increase measurement accuracy.

KW Zone Hydrometer Cum Thermometer : It is a floating type hydrometer cum thermometer.

Instructions :
Float the Hydrometer in a quiet area of the aquarium free of currents or turbulence. Alternately, place a sample of aquarium water in a clean glass or jar that is deep enough to float the hydrometer freely within. Specific gravity is determined by reading the line in the unit closest to the water surface. Read the thermometer to ensure the water temperature is safely in range for your marine inhabitatnts. The Hydrometer will float higher in more saline water and lower in fresher water. Surface tensiion creates a meniscus that should be ignored when taking a reading. Use the actual water surface level, not the highest point the water reaches on the exposed tube.

OCEAN FREE Super Defined Hydrometer : This unique hydrometer from OCEAN FREE is highly precious. Using this, you never have to wet your hand.
• Economical way to determine salinity.
• Auto filling of water.
• Easy to use and salinity result can be known instantly.
• Distinctive superior design and accuracy up to 0.001 differences only.
• A must have for all marine enthusiasts.

RED SEA Hydrometer : This unique patented hydrometer from Red Sea can be installed permanently in your saltwater aquarium or sump, allowing real-time reading of specific gravity for your best indicator of stability. It includes a digital thermometer display, making it easy to take salinity readings in the correct temperature range (the accuracy of swing-arm plastic aquarium hydrometers depends on temperature). Designed to reduce bubbles from the path of water flow for better accuracy.

Features :
• Accurate measurement of specific gravity, real time and when used normally as a hydrometer
• Easy to read digital thermometer
• User friendly patented design
Specifications :
• Hydrometer is 3.5\\" wide x 0.5\\" thick x 5\\" high.
• Comes with a suction cup for mounting.