I am having to same issue and using the same kit and also using strips. I have been boosted after more than 3 people swimming. No algae. It will be 94 today and the pool is 84. Today I will be adding liquid chlorine.Welcome to TFP.
Does your pool pass the Overnight Chlorine Loss Test? If not, you have algae consuming the chlorine being produced and need to follow the SLAM Process.
What test kit do you use?
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