Pumps

i just moved into a house that has a small (about 40 gal) pond. i wanted to put fish in it. i have everything but the water pump. i’ve been looking around and i’ve found many solar fountain heads (about $30) that are pretty cheap and then i found a solar oxygenator for $100. which one would help the fish more? flowing water or just oxygen?

To be quite honest, they are roughly the same thing. For a small pond all you need is something to agitate the surface of the water. the carbon dioxide/oxygen exchange only occurs on the surface therefore a small fountain that agitates the surface would work, or a small air pump that causes bubbles. Both are just fine.

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