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What Is The Red Liquid In A Fish Tank Thermometer? [Solved]

Alcohol or Petroleum thermometer: This thermometer can be recognized by the red liquid in the column and the ball at the bottom. The red color is a colorant that has been added to the alcohol or petroleum. To make the bottom of the aquarium thermometer heavier, metal-colored balls are often added.22 May 2018

The WORST Thermometer for your Aquarium - DO NOT BUY

Looking at the worst aquarium

How to check fish tank thermometer accuracy!

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Types of Aquarium Thermometers

A look at the most popular