Per local pool store (I know, I know), they are claiming (without seeing it) that I do in fact have mustard algae. It has turned from a medium brownish fine dust to a lighter brown. I vaccum it up, it's gone only to return the next day. Its been a very warm summer for our neck of the woods and my FC levels have been lower than they should be this summer as well, below 1.0, FC is now reading 3.8 (SWG), and all other numbers are in line with what is acceptable ranges. Borates also finally increased from 15 to 80 after adding 35#'s of boric acid. I'm also looking at replacing our Jandy cartridge filters at 3 years old which were quite dirty after my last cleaning. I'm just not convinced its mustard algae but do believe it is algae of some sort. I'm really unsure how to treat the situation. Pool store has said I need to vaccum to waste, replace water as necessary, treat with mustard algae black magic,8#'s of zip chlor and 4 oz of severest algae treatment throwing in all pool toys, brushes, etc. What can I use other than the expensive zip chlor?
I would also like feedback and a good test kit. I can spend hours looking at them, but I really don't know what I'm looking for and just want something user friendly, accurate/reliable so I can break free of the pool store games.