Collect Fire Ants and dump them in there. More fun.
Your suggestion is the best answer. Living in Texas, there ain’t nothing worse than a few dozen fire ants gnawing on you. I picture a pump truck full of fire ants with a dang strong blower, followed with a bunch of potato chips and ham and cheese sandwiches to keep the colony fed. Those ants love ‘em. Then I would rinse and repeat daily. Mostly non-lethal so the Nazi college students would have to change up their stupid chants.