4. Oxygen content of the aquarium water

In order to determine the oxygen content of the aquarium water, we needed in this attempt the assistance of some components (oxygen electrode/GTR/interface).

The values the GTR showed us were not constant, so we considered to look at these values over a longer period and afterwards to form the average value of these values.
In this way we could prevent a falsified result.

So we regarded 1min the following values:
6,8mg/l; 6,7mg/l; 6,5mg/l; 6,9mg/l; 6,4mg/l; 6,9mg/l; 6,8mg/l; 5,5mg/l; 5,9mg/l; 5,4mg/l; 6,2mg/l; 6mg/l; 6,4mg/l; 6,3mg/l; 6mg/l; 5,7mg/l; 5,8mg/l; 5,9mg/l; 6,4mg/l; 6,2mg/l; 5,9mg/l; 6,9mg/l; 6,4mg/l; 5,9mg/l; 6,4mg/l; 6,1mg/l; 6,1mg/l; 6,1mg/l; 5,8mg/l; 6,5mg/l.

These 30 values result together: 186,8mg/l; divided by 30 ---> 6,2mg/l.

Therefore the average value of the aquarium water amounts : 6,2mg/l.