Your tests will be best when you get your test kit. When I started using LC, my CYA was at 70ppm. I just had to run my FC at a higher level per the
FC/CYA Levels.
Once you get it in proper range of FC, then you add sufficient LC to offset the lost due to UV and other factors. Since you are in So. Louisiana, you will probably get some ran between now and April which will help in dilution of your CYA level. So once you test your CYA a couple of times then we can guide you how to lower it. For example, I eventually lowered mine when we had a big rainstorm predicted and I used that as motivation to drain some water and refill with rainwater and tap water. Also, since it was overcast skies, I minimized direct sun on the exposed plaster.
It would be best to start the summer at 40ppm CYA to allow for pucks usage if you go on vacation for a week or more.