Will be away for a couple of months this summer. I have configured my outdoor nano barrel pond to be self sustaining. It has been running for a week and everything is so far so good.
Here is my pond
Armed with electric fence
I added an automatic feeder. Twice a day.
Add fresh water daily when my garden drip watering system turns on.
Water level is measured by a float switch.
Power head controlled by the float switch and a timer purges extra water once a day.
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The electric fence only gives a very low current but high voltage pulse per second. I touched a couple of times by accident. Yes it is painful. It is like the pain from a static charge shock times 10.


, however I did put lots of thoughts into this pond during the years and I am happy on what have worked out so far. I build most of structures using PVC and PEX pipe. Most of them are hold by tension. I did not drill a single hole or modify anything on the Chinese Goldfish pot. 