I've mentioned this before, PO but I'll mention it again.

You can purchase for about two dollars what's referred to as a "sweeper nozzle" at Home Depot. If you point it at the center of a cinder block it will break up the water at give it very good DO levels as it enters your pond. We've measured DO of 6-8ppm if the water is injected through three or more cinder blocks. One sweeper nozzle will deliver about 2-3gpm so you could attach a four-way splitter at your hydrant and run four sweepers for a total of 10gpm with plenty of oxygen.


Holding a redear sunfish is like running with scissors.