Hi! First time ever owning a pool. Round 15'X42 above ground vinyl. Just filled it up with hose house water. Ph reads 7.7, but TA reads 250. I went to the pool store to get the water tested and they recommended adding 10lbs of dry acid???!! That seems like a CRAAAZY amount of dry acid. Plus, won't the HP level drop drastically? And they said to add 1lbs at a time and wait 3-4 hrs before adding more. There's gotta be a better, easier, and faster way. Please help!