Agreed SWG is a consumable and as a pool owner, there are expenses. Yes, the pro-rated cost is good for the benefit. The issue I have as a novice is keeping the SWG running without multiple problems. Maybe since I have taken over the pool service, I will pay enough attention to the details to ensure the equipment and chemicals are maintained, my prior pool maintenance company did not take this care. So I am a little skeptical of the SWG.