My pool is at 0 CYA. It's going to take 11 lbs of granulated CYA just to bring it to 30. I want to start by adding 5 lbs of CYA, check after a week, then go from there. My understanding is to put it in warm water, stir it around, remove strainer basket, and pour in, still in granulated form. Is this correct? 5 lbs into my sand filter isn't going to hurt anything, right?