I recently posted about my SWG failure and how I was having to slam my pool for the first time. In reading about mustard algae I got concerned because I have noticed brown stuff off and on especially where the steps meet the wall but I got the impression it wasn't that common and my pool is in full sun most of the day. Anyway I finished the slamming process and installed the new SWG setting it on 20% as the old one had been After 2 days The fc was only 5 so I upped it to 40%. Today the fc was only at 3.5 and with goggles I could see brown spots pretty much all over the pool bottom. I feel sure now that it is that dreaded mustard algae. It is fiberglass pool and I have to admit I am not good at brushing as I am a youthful but not too strong 60 something woman so I am thinking I may just have to call a pool service but know they will want to follow pool store procedures and I am a TFP follower. I am worried about new SWG I upped it to 80 % after seeing that this evening but know I have to do something quick. Could use some guidance please.