FC (Free Chlorine) is what you want, and your addition will raise it to 10which is your current shock level and just as a precaution since you have had no chlorine in the pool. Then you can let it drop down to the normal level of 3. Each night you'll add enough to raise up to 5-6, which will keep you above 3 until the next night.
I highly recommend the TF100, sold by TFtestkits.net (the link is on our homepage). (I have one and love it.) Or you can get the Taylor K-2006 thru the Taylor Technologies website, or Leslie's Pool Supplies sells a re-branded version.
Keep reading Pool School - the articles there cover just about everything but if you do have questions don't hesitate to ask.
I highly recommend the TF100, sold by TFtestkits.net (the link is on our homepage). (I have one and love it.) Or you can get the Taylor K-2006 thru the Taylor Technologies website, or Leslie's Pool Supplies sells a re-branded version.
Keep reading Pool School - the articles there cover just about everything but if you do have questions don't hesitate to ask.