CYA
To start, I would have enough CYA to be able to add 50ppm of CYA. Use pool math. Here is a good way to get it dissolved:
Hey Folks !!! With a large pool, I need 4lbs of CYA to only raise it 15, and I don't think I have that many socks without holes in them. So I use a Tshirt. Plus, I like that it's doubled up for redundancy. But it can also be scaled down with socks. So I measure out my dose and...
www.troublefreepool.com
FC
When the CYA hits the pool, chlorinate with liquid chlorine and maintain this for a CYA of 50...Link-->
FC/CYA Levels
TA
Unless TA is below 50, leave it alone. If TA is below 50, use baking soda to raise TA to 50-60.
pH.
Unless pH does not start with a 7, leave it alone for the moment. If you pH is low and your TA is low, raise TA first to 50-60, then if pH is still in the 6s, raise it to 7.4 with 20 Mule team Borax.
If your pH is high, >8, lower it with muratic acid to about 7.6
CH
You probably want about 200 CH. Your FG pool doesn't need it, but it may be called for on the warranty on your heater. Add the model # of your gas heater and we can check that out. Calcium Chloride is about the only chemical I buy from the pool store. I know it is pure.
SWCG
Do you have a salt test kit, K-1766? If not get one ordered now, you need it for your SWCG. Or
TF Salt Bundle
It is not likely that your fill water has any salt content, but he may not drain it all. Test your filled pool for salt before adding any.
Leave the cell off for 24 hours after adding salt. High salinity from you dissolving salt near the skimmer can damage the plates.
I recommend that you use "diamond crystals solar naturals" from HD. Has been the cleanest salt we have seen.
Good luck with the clean-up...we'll get you going!