Wow. A user who's teaching himself from day 1. I'm impressed.

Based on your readings, you probably DO have CYA converted to ammonia.

So yes, add borax (20 mule team from Walmart, etc. -- found in the detergent section) 2 boxes at a time SLOWLY to the skimmer with the pump running. Do NOT take out the skimmer basket. Borax can and will 'freeze' solid if you add it too fast, and it's very hard to get out. Add every 2 - 4 hours till your pH reaches 7.6+.

And add chlorine 4 gallons at a time each PM -- once the sun is less direct. Test chlorine in the AM. Continue till your FC is at least 3x your CC reading. Then, begin testing 1-2 hour AFTER you add, and again in the AM. Once your FC reading is more or less constant overnight, and your CC is below 0.2, you are ready to move on to adding CYA and adjusting other factors.

The good news is, once you get your pH is up, the CC that forms from the ammonia will be monochloramine and will kill all the algae remaining, even deep in the cracks and crannies of your plaster. This is precisely the process that products like Yellow OUT and Mustard Master use, though most pool guys don't know it.

Bad news is it may take a LOT of chlorine to get rid of all the ammonia.

But, it's a straight forward process.

PoolDoc