Hi Bearsbee and welcome to the Pool Forum! Go ahead and add a quart of plain 6% household bleach slowly to the skimmer while the pump is running. Then, in the evening, repeat the dose. Until you get some CYA (stabilizer) in there, you'll need to add chlorine morning and evening as it will quickly disappear.
After you get the CYA dissolved, you should be able to just add chlorine in the evenings only. When you get to that point, you can test in the evenings only and add enough bleach to get back up to around 6 or so. Each cup of bleach will give your pool about 1.75ppm of chlorine. Use that as a reference to help you determine how much to add each evening. You want to keep your chlorine between 3-6 all the time or you'll risk an algae bloom.
Add a half a pound of stabilizer to an old sock and hang it in front of a return jet. Give it a squeeze every once in awhile to help it dissolve faster. This should take your CYA up to about 35-40. Sometimes it is called conditioner. Check the label ingredients. If it says cyanuric or isocyanuric acid, it is the right stuff. You may be able to find some at Walmart or Lowe's but if not you'll have to get it from a pool store. Just don't let them sell you a bunch of other stuff. (Don't buy HTH brand.)
Do you have a test kit? If not, the one we recommend is the Taylor K-2006 or 2006C (same kit with larger bottles of reagents.) You can click on the Amazon link in my signature. If the seller is not Amato Industries, wait a day or two until they restock. Other sellers are sometime sending the K-2005 instead which you don't want. In the meantime, just pick up a cheap OTO/Phenol Red (yellow and red drops) kit at Walmart. While you are at Walmart buying the OTO kit and also several bottles of bleach (generic is fine), you might also pick up a box of 20 Mule Team Borax (laundry aisle) to have on hand. Don't add any yet until you test the ph and report it here.
Hope this will help you get started. Repost with pH reading and any further questions you might have.
I would also suggest reading a bunch of posts here on the forum and also at our sister website www.poolsolutions.com.
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