Sera O2 Test Kit size-20l made from high quality

made from high quality

E and antioxidants support a healthy immune system

The tubes remain in position when the lid is removed

plus it blocks debris from entering a trickle chamber filled with C-Nodes that are super-charged for fast and efficient nitrification

this high quality dry food contains a proprietary ingredient blend that supports healthy weight loss and lean muscle maintenance

Sera O2 Test Kit size-20l made from high qualityQuick 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.