Tablets erode reliably, consistently and predictably because the multi-step manufacturing and quality control process. Will not clog the system, a common problem with knock-off three-inch tablets and briquettes. More pH-friendly than chlorine gas, liquid bleach or trichlor tablets, requiring fewer adjustment chemicals, which saves money and makes water balance easier to achieve. Accu-Tab® Blue SI tablets are NSF-50 listed, contain a scale inhibitor under a proprietary formulation, and have a blue speckled appearance that differentiates them from other swimming pool tablets to prevent mixing with non-compatible tablets. “The better choice”