We had an outbreak of black algae due to lack of chlorine and have joined TFP for guidance.
We need to raise our FC level to somewhere between the high and SLAM level according to the guidance.
In pursuing this course of action, I realized we need a better test kit. However when researching the Taylor and LaMotte (sp) kits, it looks like they only measure FC up to about 5ppm. Am I reading that right? If so, how do I know when I have the proper amount of FC in my pool for fighting black algae?