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If it is the plaster discoloring then the plaster company should fix it. If you let your chemicals get out of balance it is your own fault.

The blue/gray marks can be from your leaf skimmer - it has an aluminum frame- so when you scoop it leaves marks especially if you are using it with the net inverted. But those gray marks are only about as wide as a pencil and close to a straignt line. Broad marks indicate poor chemical maintenance. Your problem not the builder.

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16y ago

What else can I help you with?