Absolutely do NOT add 17 lbs. of baking powder! Hopefully, you meant baking soda but even then, you never want to add that much of anything all at one time!
Did you buy all the stuff you mentioned above? I hope not! If you did, can you take most of it back? The only thing you needed to buy from the pool store was the CYA and 5 lbs. of it is about right. That should take you to around 40ppm which would be a good level.
Go to Walmart or whatever and get several boxes of 20 Mule Team Borax (in the laundry aisle) and some more bleach. If they have big bags of baking soda, get one. I think they are 10lb. bags. If Walmart doesn't have the baking soda, Sam's Club does. You're going to need to bump up your pH some. I'd start with a half a box of Borax at a time added slowly to the skimmer while the pump is running. Test it several hours later and redose if you need to to get your pH between 7.4-7.6. Don't worry about the alk for now. You can adjust it a little later.
Keep adding bleach while you are trying to clear your pool. Since your CYA level is 0, you'll want to keep your chlorine level around 10ppm.
I assume you don't have a good test kit. Do yourself a favor and buy the Taylor K-2006 or 2006C from the Amazon link in my signature. And, in the meantime, pick up a cheap OTO/Phenol Red kit (yellow and red drops). Each evening, add about 3 gallons of 6% bleach unless it is showing dark yellow on your OTO kit. In that case, I'd add a gallon.
Go ahead and put some of the CYA in an old sock and hang it in front of the return jet. It takes several days to dissolve and you'll likely not be able to put 5 lbs. in the sock all at one time. If you give it a squeeze every now and then, it will help it dissolve faster.
Run the pump 24/7 while you are trying to clear the pool. Order the kit so you get it ASAP. Keep us posted how it is going and let us know when you get your kit.
What kind of filter do you have?
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