My pool has been open since April and we had a pool party this weekend (8 Kids, 3 Adults) this was the first time anyone had swam in the pool this year as the water temp is still 66. When we took the solar cover off before the party we seen on the bottom of the pool in a couple of spots had what looked to be a fine brown dirt. Once everyone started swimming i noticed the spots seemed to vanish as they were probably mixed into the water. The next morning i walked out to the pool and they were back again! So i preceded to sweep the entire pool, backwashing very often. After i was finished the pool floor looked beautiful again. So as i felt like mission accomplished my wife and i leave and go out to eat. Upon our return, Hour and a half i look into the pool and those spots are back again!!!!
After reading on here i was starting to think it was mustard algae, but after reading further on the board and seeing that mustard algae does not like sun, and my spots are happening more towards the middle of the pool where sun always beats down for 3/4 of the day i am starting to think it is not. I am now leaning more towards it being pollen as i can not imagen algae growing back in this short amount of time, and pollen levels are always way high in our area. On another note my water is sparking blue and clear more so now that i am using an LQ.
Here are my levels as of this morning:
FC : 5
I was thinking of adding a skimmer sock while brushing the bottom to see if that may help these blasted spots!! Any input or suggestions would be greatly appreciated.