Another question from one mini forage pond newbie to those more experienced: Pros and cons of installing an 8" pipe as overflow drainage from forage pond to main as opposed to creating a "ditch" with rip rap.
I use a 8" pipe with gate valve so I can drain and collect into a horse tank solo - no need for help, which is huge as help isn't always available. No more seines for me! It works great, and if your main pond is close enough, you could just open it up and let the forage go.
Always keep some adult brood fish for the next cycle.
I think 8" is overkill, depending on the size of the forage and pond. I could have easily gone 6". Cost of pipe and especially the gate valve get much cheaper the smaller you go. As long as you're not raising huge fish in the forage pond, consider going smaller pipe.