So about 3 weeks ago, I noticed some algae on the floor in two separate areas of the pool in the cove.....right where the floor meets the wall. I scrubbed and vaccumed the whole pool, shocked the pool and cleaned the filter cartridge. The algae came back about two weeks later (5 days ago)........this time, almost the entire perimeter of the pool and also on the ladder. I scrubbed, vaccumed and shocked the pool again. Today, 5 days later, it's starting to come back. It's kind of a black/brown/green/yellow color. Last test 5 days ago showed CYA at 80, TA at 70, FC at 6, CC at .4 and pH at 7.2. Water temp is a steady 78 degrees.
I have an algaecide, but am contemplating using it. Should I avoid the algaecide and continue with shocking and scrubbing? Any tips or thoughts?