Proud Father......of guppies?

Ok heres the deal, I had a 10g tank with 3 columbian sharks. They were getting big and my little brother wanted to try to feed them a guppy(female). They didnt eat her(I later learned girls are difficult to catch). She was in the tank for I dont know how long. I moved them to a 60g tank. I thought to myself "maybe the sharks arent big enough". So me and my brother decided we'd try to breed guppies(as a joke). But we said when the guppies got grown we would put them in the shark tank as food. We then went to petco and bought a boy and another girl(I know the ratio is 1:3 but we didnt have alot of money on us at the time) we put the two fish in the tank with the others. They hung around the top, we never noticed any interaction between the guppies. I came home from school one day to hear my dad tell me of how he watched the sharks eat the male guppy.I was shocked...then learned why......A week or so later I was installing hardwood floors and had to move my tank so I put the fish in a bucket with a filter....the sharks over a period of two days ate the second guppy. I could also not find the first female though. I put the tank back in place and a few days later found the guppy swimming in the tank. It had been about 3 or four more days and she disappeared again so I umed the sharks ate her. about two days ago I saw her again, next day she disappeared. Today I came home and saw 1 fry swimming around...I thought it was the sharks and I was hysterical because they are nearly impossible to breed. then I looked closely and was shocked to find it was a guppy, I called my brother and spotted another. I told my mom and found another. Me and my brother came to the conclusion that while the mom was giving birth the sharks ate her. I took the fry out and put them in a cup then set up my 10g tank. My question is(for all those who sat through the story) what all and exactly do I need to care for these fry. I am looking for sort of a guidline. I need to know everything food included. I have began to love these fry and I dont want them dead, so please be intelligent and help out.