I would start early after you get the sleep out of your eyes and before much sunlight hits the water. Less (FC) competition from the sun. With each 10-min test and FC recharge, you'll be closer to breaking the ammonia wall. Once you do, you'll know it. The FC, which may have normally been dropping to about 2, will all of a sudden be up around 7-8. Then you know you're getting the upper hand. Like I said a few posts back though, make sure. Once the FC does hold closer to 10, THEN you can add stabilizer for a CYA goal of 30 via the sock method and increase the FC to 12. At that point you are in true SLAM mode. Follow that SLAM page and you'll do well from there. What you're going through right now is not rare, but it's not common either. You just got some bad luck dealt to you at opening. Chlorine, properly tested and monitored, will make it right again.