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The refracted light is reflected off a scale inside and can be viewed through an eyepiece on the opposite end of the instrument
500 l/h (396–1
Usage: Use 500 ml for every 1
this internal system is crafted to fit snugly within the aquarium
Nutrient Blend: Enriched with iron and potassium to promote healthy
Salifert Oxygen Profi Test Kit - 5193 aquarium-systems The refracted light is reflectedCorals and marine fish require very high levels of oxygen concentration because of the low solubility of oxygen in salt water so it is very important to regularly test the level of oxygen present. The Salifert Oxygen Profi Test is extremely fast, measuring oxygen levels in just a few minutes and is scaled from 2 14 mg L. Sufficient for 40 tests
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