Sera O2 Test Kit size-38g water distributor nozzle

water distributor nozzle

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Sera O2 Test Kit size-38g water distributor nozzleQuick 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.