how to attach a file from my iphone to this forum?

Middle of the editor tool bar, in between the the paperclip insert link and the camera icon there is the Insert Image. tap that.
 
What type of file might I ask? For a photo you’ll upload using the steps Allen mentioned. For other files you’ll see an “Insert Files” button right above the Post Reply. Click that and upload.
 
Hi: as you can see.. the surface looks dirty... seems like its too late in the season (phoenix) to do a acid wash... but somehow... something cleaned up a couple of streaks... so I m wondering if I adjust water chemistry to dissolve whatever is keeping the surface from looking like the clean, blue streaks..my numbers are FC 3.0.. PH 7.2... TA. 50.. CH 300.. CYA 40..Temp 80
 
With CYA 40 your FC target should be 5-7. See FC/CYA Levels

Run your FC a bit higher, about 8-9, and if that dirt is organic the CL may get them over time.
 
CL = chlorine

Reduce the calcium buildup where?
 

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