how do you cycle a fish tank with fish?

[Jackkie]

im using Prime...i just got my fish tank today its a 5 gallon (21 liter) im gonna buy 4 or 5 white cloud mountain minnow, can i use these fish for cycling? and i don't want to buy anymore products or a test kit because i spent all my money....how do i cycle a fish tank? and how do i know when its safe for fish without a test kit

 

[Hannah]

Minnows are hardy, but it's still extremely cruel. Cycle with household ammonia or fish food.