TriChlor is a chemical compound, it always releases a 2:1.2 ratio of FC to CYA.[1]
TriChlor is 10 ppm FC and 6 ppm cya, no matter the brand. The only thing different is when they take a cheap chemical such as baking soda and put it with the triclor, so you get less fc and cya with it for more money.
You may be told at pool stores that some TriChlor product has very low CYA, all TriChlor have the same ratio of chlorine to CYA. Trichlor is TriChlor. The molecule contains chlorine and CYA in the same proportions regardless of who puts it in the container.
If you have 1000 gallons of water and add 1.5 ounces of TriChlor you will get 10 ppm FC and 6 ppm CYA. If you have 25,000 gallons of water and add 36 ounces of TriChlor you will get 10 ppm FC and 6 ppm CYA. If you have 500,000 gallons of water and add 46 lbs of TriChlor you will get 10 ppm FC and 6 ppm CYA.
The ratio never changes. 5:3
