sera oxygen-Test (O₂)

Makes it easy to monitor the oxygen level in freshwater

Quick breathing at the water surface is an unmistakable sign for an oxygen deficiency. Unfortunately, it may then already be too late for acting appropriately.

The sera O₂-Test monitors the actual oxygen level in the water within minutes and allows for acting in time. sera O₂ plus provides quick oxygen supply.

Sufficient for approx. 60 measurements.