We had my slab for my 30X30 garage poured on Monday and was wanting to know the best way & when to wet cure concrete, I hope I didnt start to late. I waited 2 days after the pour, I've got the lawn sprinkler on it now, and been spraying water for about 12hrs per day. Did I start to late? and am I doing any good? or am I just wasting water? I know nothing about concrete curing just what I've read online. when the water dries on the concrete now its pretty white not like the gray it was the day of the pour. Thanks for any suggestions or comments.