When you cure tufa you can do it a couple of ways. After you unmold it, it needs to remain moist or wet to cure properly. You can stick it in a sealed plastic bag (garbage bags work great) out of direct sunlight and then mist it every day. Or just stick the piece in water. I use big Rubbermaid containers (or something similar). Then you don't have to spend the time misting it. I change the water every couple of days cuz it gets yucky (real technical term
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