I have been noticing a dark green? brown? cloud billowing from my return when I switch the pump from low speed to high.
It only lasts about 2 seconds, and seems to disappear in the pool water very quickly. My guage shows everything to be normal.
I don't remember seeing this before, and have been running this pump/filter for the past 3 years.
I changed the sand in the filter last winter, and have SLAM'd the pool this spring (backwashing the filter MANY times).
I have from 0-0.2 CC depending on when I pull the sample, and have 0 overnight loss of FC so I'm doubting that I have algie.
My questions are as follows... Is this normal? Has anyone else seen the same thing? What IS coming out of my return?