The Tunze Osmolator combines an optical sensor (immune to micro-bubbles) with a backup float switch and an audible alarm if the reservoir runs dry. Three years of operation, zero false triggers.

Related reef reading

Reef tools mentioned in this article

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Reef Tank Match Quiz

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Reef Equipment Planner

Generate a complete equipment shortlist for your build.

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Water Parameter Tracker

Log every reading. Catch problems before livestock notice.

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