My question is concerning the cooking of tomatoes in an aluminum pot. This summer I canned many quarts of salsa and tomato sauce using an aluminum stockpot. The tomato mixture was boiled for 3 hours as part of the reduction process. The mixture was then canned using conventional quart jars and the acid food canning process. Is there any concern about using aluminum and cooking tomatoes? If so, is it great enough that I should consider discarding the canned tomatoes?