Ok im pretty sure im getting fry?

Question

can i put them in a 1g tank?

and wht do i feed them

my guppies wont stop mating

Answer 1

yes, any tank is OK as long as other larger fish aren't there to eat them.  Guppies multiply like crazy, but there's a genetic defect in the population (maybe from too much inbreeding).  See if a local pet store wouldn't be interested in them.  

Ask at the pet store for fry food.  Or just take the adult food and grind it up small.  The flakes I have will crumble up in my fingers and I feed the babies the crumbles.  They seem to do fine.  Also, I have plants in the tank, and maybe they munch on them some, too.  If you try to keep it too clean, you'll almost always lose babies, depending on the filter you use.  I filter mine very gently and let the algae grow.  Put some netting over the openings to filter, too.

Good luck, live well and do good.