Very true. I check ammonia and nitrate levels often, so far no detectable amounts of either showing up on my tests. Keeping the fish load very low for the volume of water is the key. We'll see if that holds as he season progresses.
You can circulate a lot of water cheap with airlifts, they just can't lift water more than a couple of inches efficiently. Maybe you can figure a good way to circulate and filter your pond without paying a fortune for electricity.
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