Not necessary, John...
How quickly the electrodes become encrusted has a lot to do with water temperature...the warmer the water, the more "salts" are suspended in it. Lectra/San owners in FL, south TX etc do have to give it the muriatic acid bath about 4-6 months to keep it working properly, but SF Bay is pretty cold...you shouldn't have to do it more than once a year, and I'd wait for till the blinking light tells you it needs it if it were mine, 'cuz it's a cure, not preventive maintenance.However, you can prevent it--or at least slow it way down--by putting a cupful or two--no more--of white vinegar down the head once a week when it can sit in the system for at least several hours....it can stay in the system forever without harming anything, but it needs time to work, so you can put it down the toilet when you close up the boat at the end of the weekend. White vinegar dissolves urine crystals and sea water calcium carbonates in both the head discharge hose and in the L/S--so you prevent two problems at once, and it won't harm the electrodes.