DescriptionWhy need to monitor aquarium temperature? Most aquatic don't regulate internal body temperature but rather they rely on their environment. Improper temperature can lead to inadequate growth, respiratory or cardiac paralysis, and possibly death of aquatic. A sudden decrease in temperature can hurt a pet's immune system and raise the risk of it getting sick. Sudden increases in temperature can lead to a spike in metabolic activity,a to respiratory system, and coral bleaching.Features- Color: Black and white. - Material: PET. - Size: 5.00 x 5.00 x 1.00cm/ 1.97 x 1.97 x 0.39 inch. - Clear temperature scale, simply designed with clear scale, Celsius reading, ranges from 18 - 36 degrees Celsius. - Easy to stick on. The simply pulled the backing off to reveal the adhesive back and applied to the front of your fish tank, aquarium, carboy, jar, fermentation bucket. - Great way to keep a quick eye on your fish tank wine jar temp. - The thermometer strips is a piece of temperature sensitive paper. - The colored marking shows the current temperature. If show multi-color,please choose the average value.