Hi, Our new replaster is almost three weeks old. PB is adjusting all chems EXCEPT the chlorine, since we are BBB people. As WASTE said, we are lucky that they did not hassle us about it. Anyway, the CYA is 35 and we need to start adding chlorine (Tundra, 6%). Water temp today is 55. PB said to maintain about 2ppm FC; however, based on Ben's Best Guess CYA/FC chart, we should be at 3ppm FC to be algae free. Based on the new plaster vs. algae, what should we do? 2 or 3 ppm? Thanks in advance. love this site. Joyce