"Eat them",as in eat the fry... or actually eat Guppies you already have in a 10g?
10g doesn't give much option for a "micro-piscivore".... but then again a male Betta will eat new born Guppy fry.So will Neolamprologus brevis (requires hard alkaline water) or Kribs.
About the only 3 I'd recommend for a 10g.