How long will the brine keep?
We keep our brine here for a year or two. If it gets moldy, we simply bring it to a boil and re-filter it. We feel that it gets better with time. In Italy and France we see the recirculation and filtering of brine almost everywhere. When asked, some cheese makers say they cannot remember changing the brine! Most people keep the brine tanks covered and filter it when it looks dirty or cloudy. Others use a system of constant recirculation through filters. We filter ours into gallon jugs using funnels with cotton balls as the filters.