My tub is 200 gallons. I often add a teaspoon when topping off or making small adjustments. The big dropper is way easier than trying to pour into a teaspoon.
Yes, my bad. I missed where yours was ~200 gallons, so I could see wwhere a different method would be needed. Sounds like a dropper works perfect for you, I may look into something like that as well. Even though what I’m doing works for my situation , it is kind of a pain in the rear and there is likely a better way.