reebok
0
those are free chlorine ppm readings that you need. do you have algae? I don't think you've mentioned anything about your water. either you or me is entering the info into the pool calculator incorrectly. the reason it's telling you to add calcium is because you put in 180 for now and you don't change the target value. your ch is fine. refer to the link for recommended values I posted earlier. it probably says drain water because you enter in 90 for cya and don't change the target value, so it's telling you how to lower your cya (which is by draining water). I think you would be better off using the recommended values chart in pool school, it will probably make more sense. pool-school/recommended_levels
are you having some sort of trouble with your water?
are you having some sort of trouble with your water?