new to the school just got my test kit tf101 and loving it but still not sure about results.14k Gal Marcite,IG pool with cartrige filter.Checked my water then went to the pool store to see how right I am.I think I got screwed again.My alkalinity came at 25ppm when I checked it at home it was 120.So I bougth 10 lbs and put it in waited a few hrs and checked again now 160. Am I doing something wrong.