I have an 18k gallon SW in ground pool. I've had a slight algae problem for about a week now, and think I have the answer. My FC is 2, CYA 60. It's an outdoor pool, so I'm guessing I need to bring CYA up to about 70, maybe 80ppm, and FC to 4. How much CYA (dry, from Leslies) should I add, and how much dry clorine (also from Leslies) to achieve those levels, and do I also need to shock?
Thanks in advance.