Inches. -. A shoe size is a numerical indication of the fitting size of a shoe for a person. Several different shoe-size systems are still used today worldwide. In some regions, it is even customary to use different shoe-size systems for different types of shoes (e.g., men's, women's, children's, sport or safety shoes).
Types of Algae. Brown Algae (Diatoms)  This is the first type of algae that begins growing in a new aquarium. It usually grows on the gravel and glass. Unlike other types of algae, this type requires silicates in order to grow. By increasing light levels, this type of algae can be replaced by the more beneficial green algae. Brown algae can easily be scraped off the glass.
Most of the gobies kept in the home aquarium are saltwater fish but there are still a few freshwater gobies that make excellent additions to the home tank. Caring for the Plecostomus in the Freshwater Tank. The plecostomus is one of the most popular species of algae eater for the freshwater tank.