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Fish tank water turned dark purple

You'd better call them up,you don't want a Flint Michigan situation on your hands.
+1, while I'm thinking its a detection dye or chemical, better safe than sorry with that several notes worth of loaches and scats in the tank.
 
The fish seem stress at all?

Hopefully its harmless to the fish. Perhaps carbon or Purigen will get rid of the coloring.
 
I might be inclined to change a significant portion of the water again right away...especially if the cause of the discoloration is unidentifiable! And definitely call the water company to see what's up.
 
Drop Seachem a mail, they're pretty good at responding to queries
 
That's nuts! Never heard of that. Kinda cool though as lond as it doesn't hurt your fish.
 
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