At a nearby city lake that is managed by the conservation department, recent rains have sent water spilling over the dam. The creek downstream is swarming with clouds of inch-long BG and a few small GSF. The GSF are easy to sort from the BG.

What would be the risks associated with dipping out a couple hundred BG, carefully checking them to make sure they ARE all BG, and releasing them into a newly filled pond of an acre or so? The pond already has FH, GS and RE.