Most of Asbury Park never sees a sprinkler system run; the clocks tick over around four in the morning, long after Kingsley Street has gone quiet. Hydrodynamics Lawn Sprinklers LLC tends those hidden hours — turning systems on in spring, checking heads and coverage, tuning run times so a lawn caught between the ocean and the lakes gets what it needs and no more, then draining everything down when the cold comes on. Shore summers swing from soaking storms to weeks of hard sun, and an irrigation system is what carries a yard evenly through both. The proof turns up at breakfast: grass green right to the edges, dew still sitting on it, nothing gone brown along the hot side of the house.