Not necessarily. Usually, whatever you had for CYA will be close to what you have now. It doesn't drop on it's own. You can get more reagent from Amazon, or go directly to Taylor website and order it. The Walmart HTH kit is a rebranded Taylor kit. The reagent you want is R-0013. Best to get the 2oz bottles.

If you know your CYA level, you can use the Best guess chart to determine your ideal FC level.

There is a way to use the OTO kit for measuring higher than 5 on your chlorine, but I don't have the link handy for those instructions. Be aware also that this method isn't that accurate, but is better than "guess strips".

Now you know why the Mods here are always pushing the Taylor K-2006 kit. You would be money ahead to purchase it, through the links from any of the mod's signatures.