Sera O2 Test Kit size-38g Suitable for adult over 7

Suitable for adult over 7 years of age

Hide rocks are strong

It is best to only replace the BioMedia when you do a complete tank restart as to not disturb the beneficial biological load

Fin and Tail Rot and other external bacterial diseases in fresh and saltwater aquariums

Sera O2 Test Kit size-38g Suitable for adult over 7Quick 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.