Best way to remove this organic stain

[illmac77]

After doing a SLAM and having the water balanced. Looking at the best methods to remove these stains from the side walls an around the main filters. Tested with a puck an they do disappear....

FC 10.6
cc 0
PH 7.8
TA 70
CH 350
CYA 80

 

[woodyp]

Keep your FC elevated by 3 or 4 points for a couple days and see if they disappear..........NOT full SLAM level.

 

[pooldv]

More here, Pool School - Pool Stains

 

[illmac77]

Wow. 60-100 above Slam level? For how long?

 

[pooldv]

What is 60-100 above slam level? The article says this,

To remove organic stains raise the FC up between 60% and 100% of shock level for your CYA, Chlorine / CYA Chart, and brush often, daily if you can.

So, if shock level is 20 ppm then 60% of shock level is 12 ppm and 100% of shock level is 20 ppm. So raise FC up to between 12 and 20. [FC/CYA][/FC/CYA]

 

[illmac77]

lol of shock not above... Thanks!!! let me see if that works