Odd Line of dirt

[CLW42]

Hi Guys,

I have this line of dirt in my pool that appears and reappears with great regularity. I'll vacuum it up or the robot will pick it up and a day or two later it's there again. It's located in the shallow end of the pool just before the slope begins and just before a seam in the liner. I don't appear to be losing any water so I don't think it's a hole or tear in the liner. And as you can see the water is crystal clear.

For good measure:

FC = 5.5
CC = .5
PH = 7.4
TA = 75
CH = 113
CYA = 70

Here's a couple of photos.

 

[JasonLion]

That is very common. There is a slight lowering in water flow right there, so debris being carried around by the current tends to drop out and collect there.

 

[CLW42]

That is very common. There is a slight lowering in water flow right there, so debris being carried around by the current tends to drop out and collect there.

That's sort of what I was hoping, thank you for confirming!