Tony Havranak, left, and Justin Wolters implant trackers into carp taken from Grand Lake. Havranak, a fish biologist from a Minnesota consulting firm, and Wolters, an Ohio Department of Natural Resources fish biologist, installed the trackers in 10 fish, which will be tracked to find large schools of carp for the rough fish reduction pilot sponsored by the Lake Restoration Commission. During the procedure, the fish are placed in an anesthetic bath and, once they are knocked out, have a tracker placed in their stomach cavity. After being stitched up, they are placed into a recovery net in Grand Lake, where they eventually rejoin their schools. Commercial netters are set to arrive in the second week of April to harvest hopefully large quantities of carp, LRC director Milt Miller said.