The target is 5 ppm FC. It is not advised to use Minimum FC as part of a range.At CYA of 70, your SWCG range is 3-5. Non-SWCG range is 8-10. Why so high for your SWCG pool?
For those with past issues with algae and more susceptible to water chemistry issues, keeping the FC close to 10% of CYA is advised.