This is where you store hardcoded industry numbers. If a manufacturer changes a formula or you want to adjust your store's default targets, you only edit this one file.

    What it holds:

        Liquid chlorine concentration factor (e.g., LIQUID_REDUCTION_FACTOR = 0.75 for your 12.5% logic).

        Standard target landing zone (e.g., TARGET_LANDING_FC = 3.0).

        Volume baselines (POOL_BASE_VOLUME = 10000, SPA_BASE_VOLUME = 100).