Sera O2 (Oxygen) Test Kit

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measures the oxygen content warns of dangerous lack of oxygen for freshwater aquariums and ponds easy to use for approx. 60 measurements Makes it easy to monitor the oxygen level i n freshwaterQuick 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. Show more