No matter how big the pond is!
It is about this;
Chris Neaves................................
- Quote :
We are always told a venturi dissolves OXYGEN into water. This is not entirely true. The atmosphere is around 80% nitrogen, 18 - 19% oxygen and 1 - 2% other minor gasses. A venturi pushes air into the water under pressure - not only oxygen.
Dry air contains roughly (by volume) 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, and trace amounts of other gases. Air also contains a variable amount of water vapor, on average around 1%.
When using a venturi these gases are blown into the water by an extreme force.
This result in that the “dangerous gasses” stay in the water for quite a long time, is then taken up through the gills of the fish when the fish gather oxygen from the water.
This then leads to stress and other diseases.
When making us of a venturi, it is best to lift in out of the water, above the water line, this will help the gasses to escape before it enters the water.