Tetratest Oxygen (O2) for Freshwater and Marine Aquariums

Simple to use kit for determining oxygen levels.

• Highly accurate liquid test
• Simple to use
• Excellent long-term stability
• Sufficient liquid for 30 tests

Application

The Tetratest Oxygen kit is a liquid kit, which works by changing the colour of a water sample in relation to the oxygen concentration. You simply need to compare the colour of the sample to the enclosed colour chart, to determine the oxygen level.

It is advisable to test oxygen levels first thing in the morning, as this is when they are likely to be lowest. We recommend testing the oxygen levels every 2-3 weeks, or more frequently during hot weather.

(Source: http://www.tetra-fish.co.uk)