Combine 2 cups of dried hibiscus flowers, 4 cups of water and 2/3 cup of sugar (or equivalent in sweetener) in a medium saucepan.
Bring to a boil and simmer for about 15-20 minutes.
Remove from heat and let cool until room temperature.
Add 6-8 more cups of water.
Serve over ice. (I filled my gallon pitcher about 1/3 cup full of ice and added my tea to that.)