I have a 18' round 52" above ground pool that has been set up for 3 seasons now. I have the intex saltwater generator also hooked up but have yet to turn it on this season. I got algae at the end of the first season which cleared up with algaecide and closed the pool crystal clear. Last season I opened to crystal clear pool and I ended up with what i suspected to be mustard algae which I tried to get rid of by shocking and stuff from the pool store. It would clear up and then a few days later be back. We opened the pool last Friday and to my surprise the same algae was back. It looks like dirt on the pool floor and is only on the left side of the pool. It turns to a cloud when brushed. So I shocked the pool everyday until monday. I did the overnight FC test and for the past 2 nights there hasn't been any loss. I brushed the pool floor in the morning and by night time the dirt looking algae is back. The filter has been running 24 hrs.
These are the results from this am.
i don't know what else to do. The water is crystal clear and has been since I opened the pool.