I can't provide any specific evidence as to how well they work to "hold fish", but I can offer some basic advice.
You will need to put holes at the tops to allow any air accumulation to escape. You will likely hit steel cords if you go thru the tread. Drop down to the wall of the tire, keeping about an inch away from the tread. I also punched smaller holes thru the walls, at mid height, to allow lashing them together to support each other and stand up. I used UV resistant, heavy duty zip ties. Here, some years later, most of them are still lashed together and standing. The couple that busted are suspect due to ice movement....which leads me to my next piece of advice. If in a climate that suffers hard freezes for weeks or months, consider how low the pond level might be at the time the freeze occurs and weigh that against the top elevation of ANY structure. I have had plenty of damage to anything that got frozen into a 2 or 3 acre ice floe that the wind pushed around the pond.
