Allan writes, The purpose of the filter course is to prevent fine soil medium particles from washing into the drainage layer causing clogging or reduction of the drainage capacity of the drainage layer.
Just how much caffeine is too much? For the average person, up to 300 mg of coffee a day, or two to four cups of the average brewed coffee, is a moderate amount that isn't harmful. But once you hit more than four cups, you may experience less-than-desirable side effects.
Women indicated that drinking coffee is a good way to relax. Men indicated that coffee helps them get the job done. The United States imports in excess of $4 Billion worth of coffee per year. Americans consume 400 million cups of coffee per day making the United States the leading consumer of coffee in the world.