In a method for water treatment by chlorine disinfection, a chlorine stabilizer is dosed into water to be treated as far as a predetermined chlorine stabilizer concentration in said water is achieved. The present invention also provides a method of selectively inducing growth arrest, terminal differentiation andor apoptosis of neoplastic cells and thereby inhibiting proliferation of such cells. Responsive to the SAT problem being satisfied without constraints, a set of variable assignments that are determined in satisfying the SAT problem without constraints are fixed. The installation of this invention is maintained in a fluid flow containing conduit and includes a pipe section affixed between sections of the conduit. The front frame member is disposed adjacent the front wall and extends between the side walls.