Thanks. I reviewed it again and see the cya and fc must be balanced. I didn't realize before that it buffers the fc. I see that in the cya article. My cya is probably at 50 if I round up.. I have an autocover, does this mean my cya can be kept lower or I should still aim for between 70 to 90? I plan to close the pool in next two weeks if I can get everything balanced correctly and rid the supposed algae. Should I try to raise my cya to 70? I can put some in my skimmers tonite while running swg 100%. Or focus only on getting to the oclt for now?