Streaky pool walls

[newpooler]

Hi All,

This started last year. The walls of my pool are streaked kind off brownish. Not the floor though. I tried scrubbing them and the chlorine, stop yellow routine but it didn't work. What causes this and what can I do about it?

Winter Park FL, 10,000 gallons, surfaced with marbeletite 5 years ago, 1.5 hp filter and DE Filter.

 

[Razorhog]

Sounds like metal stains. To be sure, try rubbing it with a vitamin C tablet. It comes off like magic if it is metal staining.

 

[pooldv]

Read this
Diagnosing Pool Plaster Problems
and this
Pool School - Calcium Scaling
and this
Pool School - Metals in the Water and Metal Stains

Give us some test results. A few of the last sets if you keep records. Especially PH, CH and TA.