White line on tile

[tcat]

Only real issue I have since switching to SWG a month ago, is I'm getting a "ring around the pool". Either from salt or calcium. I got my calcium down to 450, but even when higher with LC, I never noticed the line. Nylon brush doesn't do it. Suggestions?

 

[kimkats]

@tcat using pool math what is your CSI?

How easy is it to get off?

 

[tcat]

-.09
I used 25% MA in spray bottle yesterday. Lots of foaming. Twice around seems to have done the trick. Could be my CH was like 900 at start of year, until I drained a lot. Now 450.

 

[Mdragger88]

If it foamed, its a calcium/scale issue.
Hopefully once u get it cleaned up & really stay on top of csi it won’t come back.
Is your fill water high in ch? If so can u use softened water to top off the pool?

 

[tcat]

Fill is 220, no softener. At least it's diluting the 450!

 

[Toxophilite]

MY CH stays at bottom of recommended range. Liquid chlorine, but still get that at the evaporation line from time to time. I keep a more diluted spray bottle of MA/Water in the kit, and just give it a spray and wipe/wash down while in the pool as regular tile maintenance. It comes off easy if you don't let it build up. The first time I went after it, it was almost past the point of the solution. Everything burned off but a faint line I could not remove. I overfilled the pool for a day or two and lowered the pH to about 7.2-7.4 and the line disappeared.

 

[tcat]

Yeah, had to take a razor blade to a couple spots, but most came off with the spray.

If it's not one thing it's another. Notice my water level was down a couple inches, auto fill filling, then I noticed water coming from waste line . Took apart multi valve and sure enough gasket shot. I'd bought a new multiport valve a year or so ago, since gasket was glued in good (glued into new one too). Trip to HD for 2" unions.

 

[kimkats]

Can't use just one (for getting all of the line off) then (for the leak) then (for having the valve already).

Man you have been through it for sure!!!

 

[tcat]

Was able to save the existing unions by moving the filter 2"closer to the pump! A bit of sanding paint off, and good to go. Will wait an hour before turning things back on. Old one shown in photo (after tearing gasket out). $32 worth of union back to HD.

 

[mgtfp]

Fill is 220, no softener. At least it's diluting the 450!

Longterm, it's only diluting the calcium concentration when replacing pool water directly with fill water, like backwashing-losses or splash-out. I guess, that's what you were referring to, just thought it's worth clarifying that for newbies reading the thread.

When replacing evaporated water, then you are swapping CH 0 water with CH 220 water. The calcium doesn't evaporate and builds up with every fill water addition, even though you are momentarily diluting the calcium concentration while filling.

 

[tcat]

Just got my water bill . I think my multi port valve gasket must have had a slow leak before it burst. My usage was 3x normal! I did drain and fill about 8k gallons (not the extra 30k!). Lesson learned, check for leaks out the water line!