I am trying to raise my pool's chlorine to 10ppm. I have no chlorine or CYA in my water. I've added 37 oz of 10% chlorinating liquid to my swampy 2900 gallon pool. I've let it circurlate for several minutes and my chlorine reading was FC 2.5 and CC 3.5. I took another reading 15 mins later and my numbers were the same. Am I doing something wrong? Have I given the chlorine time to circulate, or is it being eat up that fast? There is no CYA in the pool. I'm trying to make sure I have no ammonia in it.