Update!

Thanks to you folks, I think my issue was with sanitation vs. cleaning ability. I shocked to 20 ppm (highest I've EVER gone in my pool) and now hold the chlorine between 5-10 and all is well. Chlorine level seems to drop about 5 ppm/day though, which seems kinda high???

My pool has been crystal clear for a week now and I think I just need to keep it at/above 5ppm now. Previously though.... 3 ppm used to be good for a non-green pool, but I guess maybe my stabilizer levels were lower in previous years.