I can lend you Bonnie and Clyde
this is my Golden Wonder Killifish pair. I wanted to clean out a couple of my shrimp tanks from being overrun with scuds/water fleas/planaria whatever.....took out the shrimp that I could see, and dropped Bonnie/Clyde in for what I thought would be a day or two.
Next am they were both at the front of the glass wanting snacks
seems they ATE everything alive in the tank...and I mean everything, not a snail, planaria, aquatic creature of any kind lived after 24 hours, why I nicknamed them B/C.
I have since used them on more tanks to do the same and its amazing.
Sorry Im not close enough, but maybe someone else has a couple Killifish you could borrow for a day or so.