I'm sure you can relate to this. I live in an area of Florida where there are a lot of pools and a lot of so-called pool experts. Last year I had what I'll call "Dead Algae Dust" accumulate in the bottom of the pool. I was clueless as to what it might be. Then I had the "Cake Icing" deal. I have in my files, a water report for every month the past 14 years. This is, and has always been a saltwater pool of 10,000 gallons. It has been shocked 3 times in 14 years. Never used dry acid. Has never tested positive for metals. The calcium level has always been around 200. Have never put an algaecide in the pool. This pool is known in this area as the one everyone wants theirs to look like. When the pool refinisher came to buff all the "Cake Icing" from the walls, he said he had never seen a 14 year old finish in as good a shape as mine.
After much research on the web pertaining to my 2 problems, (Dead Algae Dust & Cake Icing) an article on TDS'S seemed to explain what my problem MAY be. Not saying it is, but that's all I was left with.
There is no doubt the "Cake Icing" was calcium, but what caused it, taking into account the care I have given this pool, remains a mystery to me.
Thank You.............