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). Read more.
Aquarium Moss 101. There are many different types of aquarium moss with a variety of different uses. There are ten common types of moss that make beautiful aquatic scenery. Below are the types and differences between them; decide which of these will be the most beneficial to your fish. Java Moss.
And if you happen to be an alga, you are not alone: there are more than 20,000 varieties. In a swimming pool or spa, algae is that green, brown, yellow, black or pinkish slime that resembles fur growing on the steps and in cornersâplaces where circulation may not be optimum. The majority of swimming pools are in the sun several hours per day, and it is sunlight that will speed up algae growth.