Total Count provides an excellent nutrient base for general growth. This medium is used to determine total microbial count, without differentiation of microbial types. This medium may be used with regular or Tetrazolium-salt (T-salt) coated petri dishes. This medium used in conjunction with T-salt petri dishes will result in all bacterial colonies turning a red color, due to the reduction of the T-salt by the colonies. The red color makes counting easier for inexperienced users or when samples are very high in particulates. The function of the medium is unchanged when used with either type of petri dish. Total Count is also known as Aerobic Plate Count and Standard Plate Count. Must be used with Easygel® pretreated petri dishes (included).