There are various brands, in fact the maker of BLC caustic makes an acid cleaner called ALC. LHBS carries BLC but not ALC, so I checked on the suitability of B.S. Remover for line cleaning. (It's not labelled for this use.) So you could probably find any number of combinations of products to do the job. It was useful to get tech support from 5Star on that. Apparently all you need is to make sure, if you do regular caustic cleaning to remove organic material, that you periodically run an acid capable of de-stoning. DBQM (see my post above) outlines the goals, we just need to find solutions that match our resources!