My salt levels have held steady since our pool was built until I tested tonight. It usually runs right at 3400 but it's now at 3000. I do have the Taylor salt test kit. Pool Math tells me to add 29 lbs. of salt which isn't even a full bag as I understand they are 40 lbs. Should I go ahead and add the approximately 3/4 bag? Any special instructions on how to add it? SWG on or off? Shallow or deep end? I'm assuming I should brush it around so it doesn't just sit on the bottom? I also think I read something on this forum about the Clorox brand salt staining the bottom of the pool so I'm going to avoid that brand.