Water is water, right? Look at water as a vehicle. It is a key component of your fluid package helping deliver sand, inhibitors, friction reducers and other chemistries in, and debris out. Every time we use a water source, we leave behind industrial chemicals and formation chemistries. Every time we reuse that water, we are increasing the load that water must carry. It is water plus everything else, creating a balancing act of functionality. You can frac with any water, but the more it is carrying the harder it can be to treat. Water can carry microbes out of the formation, bringing them to surface, perpetuating top-side growth of formation loving microbes. This is the reason why we say water can get harder to treat. Don’t be afraid to adjust your biocide dosage to overcome the challenges associated with highly recycled waters.