Pond Boss Forums MANAGING AN EXISTING POND Evaluating and adjusting fish populations stocking bream in a pond with an Existing pop.

You can use cages, but it will probably be cheaper to buy a single net large enough to block off an area. Not only do you have to buy netting for the cages, but you need to make a framework to hold them, plus floats and a top cover (to keep the herons and 'coons out).

In no particular order, google the following:
Memphis Net & Twine
Jans Netcraft
Brunson Net Company