Our headmistress says
don't put in bleach or conditioners with oil in them. Use superlube to keep the pump operating smoothly (once per year). Rinse it out with fresh water(from your holding tank or a hose) and pump it completely dry. Make sure it's properly ventilated.If you aren't able to macerate or pump out regularly, she recommends using organic products that will stimulate aerobic bacterial decomposition.Working fine for me, and it's cheap. Hope I got this right Peggy.ScottS/V Hello Dolly