i am about to build a watering system with a 55 gallon plastic drum, with a pvc manifold that has five hoses, each one of these hoses is going to be connected to a five gallon bucket with two poultry nipples in the bottom of it and each of my coops will have one of these buckets in it. since the system will always have water in it i am wondering how i will keep the algae out in the summer. i am thinking acv will be too expensive and i dont think that really controls the algae that well anyway.