You can easily fit 1 inch of fish per square foot of surface area. So for 10 foot by 10-foot ponds you have about 100 square feet of surface area. This means you can fit about 100 inches of fish.
It’s best to not pack as many as you can into a pond. This makes sure they’re comfortable.
“We’ve all had that it’s-to-crowded-in-this-elevator moment. Let’s not do that for our fish,” Hanna says. Paul nods his head. “Yeah, it wouldn’t be great. This next part tells us more about why overcrowding isn’t good for fish.”