As a rule, aquariums are made of silicate glass or organic (acrylic). However, many people don’t know what the difference is between the two – except that an acrylic aquarium is usually much more expensive. Because of this, it may seem that the acrylic aquarium is better, but this is not always the case. Both materials-acrylic and glass-have their advantages and disadvantages.
Glass is very difficult to scratch. This can be done only with a solid material and with the application of certain efforts, for example, a piece of unpolished aquarium gravel, stone or metal, deliberately leading them on the surface. Continue reading
What is viviparous?
Most fish lay eggs, but some species give birth to fry. There are two types of viviparous – viviparous and oviparous. The oviparous bear eggs inside, and the fry are born fully formed. They get their food from the deutoplasm. In the case of viviparous, nutrition is obtained directly from the mother. About 15 of the 480 known fish families exhibit some form of live birth. This includes half of all sharks and rays, as well as viviparous carpenters such as guppies, swordsmen, and mollinesians, as well as a number of unusual species.
How do viviparous mate? Continue reading
The hardness of water is the amount of minerals dissolved in it. If the amount of dissolved minerals is high-the water is hard, if low-then soft.
Water hardness increases when filtered through porous rocks such as chalk or limestone. Signs of high rigidity is the formation of lime plaque on pipes, taps and inside kettles, as well as the formation of foam on the water when adding soap. Hard water is found in areas such as lake Malawi, where fish are adapted to high hardness and pH levels.
Limescale and soap suds do not form in soft water. Soft water flows over hard rocks, such as granite, or through fallen leaves and peat, from which minerals are almost not washed away. Continue reading