If you leave the efflorescence in place, it will crystallize, making it harder to remove.
It may take a little elbow grease to remove all of the visible white powder.
The water may flush out some of the original salts from the concrete, so you may have to repeat this process. If you need to, you can also pour water from a bucket onto the pavers.
Vinegar may not remove large buildups of efflorescence. Most common vinegar is 6% acidity.
Wear rubber gloves and goggles to protect yourself while you’re working with muriatic acid. When you’re diluting muriatic acid, pour the acid into the water, not the water into the acid. This will help prevent the acid from splashing up and burning you. You can purchase muriatic acid at a home improvement store. For an even stronger solution, mix white vinegar, ammonia and muriatic acid and let it sit for a few minutes before rinsing.
By minimizing the cleaner you use, you will also reduce the amount of water needed to rinse it off of the pavers.
