Hi Ruby,
Welcome to TFP! You have come to the right place!
we dont recommend adding anything that your pool doesnt need. So, a good and reliable test kit which can test all of the water parmaters is essential. The TF100 XL test kit can test for everything that your pool needs. Most of us here on TFP use the TF100. They are only available online at
TFTestkits.net
Get the test kit going asap. The sooner you get it delivered, the sooner your pool with be top notch.
Start off right with the BBB method. (we call it TFPC now). You'll need some liquid chlorine. Either bleach (no fancy scents, splashless additives or any of that), or Liquid Pool Shock. Liquid Pool Shock is the same as bleach, just a higher concentration.
dont go out any buy anything else yet. We need a set of test results in order to know what the pool actually needs.
In the meantime, if you can add 1 gallon of bleach every day, that will probably hold any algae from growing until we can get some test results and get you sorted out on the right path.
Also, we'll need to know more details about your pool, so please fill in your pool specifics in your sigature. Fill in as much as you know. It will help us help you. Here's how.
Pool School - Getting Started
In the meantime, please this. It will help you understand the different water parameters and how they play together.
Pool School - ABCs of Pool Water Chemistry
And the recommended water parameter levels are -
Pool School - Recommended Levels
And you need this chart
Pool School - Chlorine / CYA Chart
And also play around with pool math and learn how to use it. Its pretty handy and will be your best friend,
http://www.troublefreepool.com/calc.html
I hope this helps get you started.