For 3/4 acre pond and wanting a fyke net I would buy as small of one that is made. Fyke nets are usually fairly large compared to small fish and minnow traps. I built a small fyke net for a fish sampling study that I did for a pond boss conference. Basic box was around 2.5 ft on each side. Leads or wings can be as long as you want them. Instead of buying a fyke net consider buying or building a couple larger fish traps such as a Z Trap or from this company. Larger traps are easier to handle and use compared to a fyke net that is designed for use in larger bodies of water.
https://ktraps.com/One can put leads or a wing or wings on a larger fish trap to have it catch more fish. A fyke net is just mainly a box type trap with wings.
