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?
Flowing water adds oxygen into the water... So Id go with that one.
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.
