Streaks on Pool Floor (pics attached)

[Henry121083]

HI All,
I have a gunite pool - and it looks like (maybe) the robot left some sort of streak on the pool floor. I am not sure if it was from the robot, and it's slightly green, and doesn't brush up.

I'm going to test the water tonight - but was wondering if anyone has seen this before?

 

[jblizzle]

I can't think of how any cleaner would do that.
Does the streak look like it "flows" downhill? Like if some contaminate ended up on the floor and as it dissipated it flowed down the pool floor.

 

[Henry121083]

I can't think of how any cleaner would do that.
Does the streak look like it "flows" downhill? Like if some contaminate ended up on the floor and as it dissipated it flowed down the pool floor.

i dont think it's any kind of contaminant it's kind of green like algae, but it doesn't come out with chemicals (liquid chlorine) or by brushing.

I'm going to test the water tonight or tomorrow and I'll post results

 

[gonfishin]

Do you have any chlorine pucks? You could try setting one on the stain for 5 minutes or so to see if it removes or lightens the stain.

If that doesn’t work, you could follow the directions found in pool school for identifying and removing stains.