1/2 onion, thinly sliced
2 medium cucumbers, thinly sliced
1 cup water
1 cup cider vinegar
1/2 cup champagne vinegar
1/2 cup sugar
2 tablespoons plus 2 teaspoons kosher salt
1 teaspoon mustard seeds
1/4 teaspoon ground turmeric
1 teaspoon celery seeds
1 teaspoon pickling spice
4 whole garlic cloves, smashed