Question:
I am concerned with a pump and filter system, 180 gallons in direct sunlight.
Answer:
I have not seen a solar pump that would cycle the pond every hour which is recommended, but if you have fish, you really need the oxygenation from a waterfall or water spout to keep your fish healthy. There is quite a bit of time at night that they would lose this. And to have batteries that would charge and keep it running would be a little expensive for a pond.
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