Aqua-Guide

Aquarium Circulation Pump and Aquarium Powerhead are used to give your water oxygen. They can prevent waste build-up and dead spots.
Powerheads have multiple purposes in a fish tank. Basically what they do is they draw water in one end and force it out the other way, while this happen it creates a current in the fish tank. While this current creates waves it draws some air in and...

For a freshwater aquarium to be fully cycled usually it takes up to 1-2 months depending on many factors.
Example: a 10 gallon fish tank with 3-5 Tiger Barbs fish it would take around 35 days to be fully cycled and ready to have species of fish.
I highly recommend purchasing cheap hardy fish to cycle a freshwater fish tank example: Gouramis, tigerbarbs... ect. When you purchasing a fish at the petstore make sure you know if they are compatible with the fish that you already have in your fish...