Well, of course bump the FC back up to 24 based on your (rounded-up) CYA of 60 to keep your SLAM going. Something I learned a while back on my own pool was that more is not always better or always understood. By that I simply mean that if your SLAM FC is 24, going a little higher (like you did this morning to 27) may be practical if we're away from home and using the added FC as insurance. I do that too. But at the same time we have to remember that since we're so high over our normal target FC level based on our CYA, the extra (higher) FC will get eliminated quicker either by the sun or remaining algae (or both). So we have to be vigilant to keep the FC high for a SLAM in-part because of algae and because the extra FC is vulnerable to sun loss. I hope I'm saying that correctly. If not, I'll get "TFP-spanked" by the crew.
In any case, I would say maintain, maintain, maintain! Your true report card will be the overnight loss test. That's when your FC is higher than normal (like now), but there is NO sun to steal the FC (or less than 1 ppm). So if you fail, you know it's algae-related.
Keep it going!