When they put'em in Conroe it was crazy. it didn't take long for the Hydrilla to disappear. I think it was being sprayed at night too. One of the Murray brothers had a house on Conroe and when he'd cut his grass they'd come up and eat it off the surface. He killed a bunch eat time. The funny thing was that after they ate all the grass, you'd see asians fishing for them with surf sided tackle and they were using lettuce and cabbage for bait.