I hear a lot of people say that placing fish in small tanks or ponds would stunt its growth, I do want to know if how big a pond is for koi fish to naturally grow into its maximum size. Pond size or gallons/liters per fish.
When we say stunted, what that means is that the body stops growing, but this doesn't restrict organs from growing. Normally this kills a fish. You can't give a koi a gallons measurement because you need to factor in width and lenght of the aquarium also. I would say 200 gallons for one fish but not a 200 gallon aquarium because it isn't wide enough. I hope that makes sense