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Hi to all, as this is my first post on this forum.
About this pond & system: to put things in perspective; this is NOT a hobbyist pond! The owner is a -German- manufacturer of monitoring and controling equipment.
In this system they incorporated all the techniques they have. On one of the shields it says -translated- "demonstration unit".
This is why you see stunning technique and maybe a bit less stunning koi....
About the O2 generator:; this is actually an O2 concentrator as it takes in normal air and filters out the CO2 / N2 etc. These units are derived from the units seen in health applications (for people with respiratory problems) and considered safe for handling by "non professionals". They generate +/- 5 liters per minute at 95% pure O2. In this system O2 is used to optimise the O2 content of the water and suplied to the biological stage (see the reading on the control panel: 10.17 mg at 21.7 C is way over 100% saturation!).
About the hydrochloric acid; this is used to control (in this case: lower) the pH of the water.
Cheers, Hans
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