To shock you need to keep your FC level at least 30% of your CYA reading. That is... At a reading of 70 cya, your minimum shock level would be 21FC. Run your pump 24/7 and turn off your SWG. Keep the shock level up until you do not loose more than 1 FC overnight. Then, you can turn back on your SWG and reset your pump timer.

Based on your prior postings, your cya level is likely much higher than 70. It's just not yet showing up in the test. So, retest and adjust accordingly.