Indigo HydroForce Extend Wetting AgentHighly Concentrated Residual Soil Surfactant HydroForce Extend is a 100% non ionic, residual surfactant formulation for long term prevention of localised dry spot occurrence. HydroForce Extend is unmatched in its residual performance capabilities in both sandy and finer textured soil profiles. HydroForce Extend also has excellent warm and cool season turf safety characteristics and can be used in all forms of turf management, where residual properties