For a pool deck you may get away without watering it. But, just in case others see this thread ---- the curing of concrete is a chemical process called hydration. It is not a drying process. It is particularly important to keep it wet/moist for the first 3-4 days and the longer the better. Use a lawn sprinkler or cover it in plastic or burlap, "hire" a neighbour, or anything else that serves the purpose. Keeping it moist contributes significantly to its final strength, lower propensity to crack, abrasion resistance, and impermeability. These may be less critical structurally for a pool deck slab but for a pool shell, retaining wall, house foundation/wall/slab it would be very important.