My son and I drink at least 1 gallon of iced tea every day all year long. I grew up drinking it daily. It is always in the fridge at my house and mom's. Here's how we do it.

Fill up tea pot.
When the pot whistles, dump the water in the tea jug. (Just a plastic 1 gallon pitcher from Wal-mart.)
Add 3 regular tea bags.
Let set for 30 minutes.
Remove bags.
Add your favorite sweetner to equal the sweetness of 1 cup sugar.
Fill the pitcher the rest of the way up with cold water and enjoy.

Because water in a tea kettle never boils, there is no acidity.