Glass Aquarium Thermometer Hagen MARINA (model 010633) — glass stick thermometer for aquarium temperature monitoring

The Hagen MARINA glass aquarium thermometer (glass stick design) is a simple, reliable instrument for monitoring water temperature in freshwater and marine aquariums. Its clear glass stem contains a visible temperature scale that allows quick checks of tank conditions. The thermometer can be placed directly inside the water or pressed against the aquarium glass for continuous observation of temperature levels relevant to fish, invertebrates and aquatic plants.

Advantages

This glass stick thermometer provides an easy-to-read scale and a slim profile that minimises visual intrusion inside the aquarium. The glass construction ensures chemical inertness and straightforward cleaning, while the compact size allows placement in narrow areas of the tank. No power source or calibration tools are required for basic temperature monitoring, offering a low-maintenance solution for hobbyists and professionals.

Suitable for

• Freshwater community and planted aquariums
• Marine and reef tanks where visual monitoring of temperature is needed
• Breeding setups and shrimp or fry rearing tanks
• Temporary use during water changes, acclimation or equipment testing

Key specifications

• Design: glass stem (stick) thermometer suitable for submersion or placement against aquarium glass
• Scale: clear, printed temperature scale for quick visual reading
• Compatibility: suitable for both freshwater and marine aquarium environments
• Installation: direct immersion or glass-mounted positioning
• Maintenance: simple to clean with soft cloth or aquarium-safe cleaner

How to use

Rinse the thermometer with dechlorinated water before first use. Place the glass stem inside the aquarium at a mid-water level away from heaters, filters and direct water flow to obtain an accurate reading representative of tank conditions. Alternatively, press the thermometer against the inside surface of the aquarium glass so the scale is visible from outside. Allow the thermometer to stabilise for a few minutes before taking a reading, and avoid rapid temperature shocks that could stress the glass.

Usage recommendations

Inspect the thermometer regularly for chips or cracks; replace it if any glass damage is visible. For continuous monitoring in critical systems consider combining this glass thermometer with an electronic or digital thermometer for alarm capability. Clean the glass gently and avoid sudden impacts to prolong service life.