Having someone add a jug every 2-3 days would probably work. Can you get a timer and just have it run for a couple hours a day so that on days when bleach is added, it will circulate. If your neighbor is coming over every couple of days, he could notice if the water level is low and if so, turn the timer off. He wouldn't really need to do water testing. Is your pH pretty stable or does it tend to fall?