JBL Precision hydrometer
You’ll find answers to the most frequently asked questions in our FAQ section. If you can’t find what you’re looking for here, please don’t hesitate to contact us directly – we’ll be happy to help.
The hydrometer doesn’t contain any mercury. The liquid contains an alcohol solution with colouring. It is non-toxic. Both ingredients are quickly broken down by the bacteria in the aquarium. Furthermore the diluting effect should be taken into consideration. The silvery pearls are an iron compound and are therefore harmless. Simply siphon them out of the aquarium.
A reading accuracy of 0.0005 units makes the hydrometer very accurate. _x000D_ The built-in thermometer, which covers a scale from 9°C to 32°C, and the temperature correction scale gives you the highest precision. The density is determined in a range of 1016 to 1028.
Ask the JBL Service Team your question.