What is a nitrate filter © underdogstudios Fotolia.com In a nitrate filter, bacteria convert nitrate into nitrogen. This requires anaerobic, ie low-oxygen, zones in the filter. Because there is no oxygen available to the bacteria in these areas, they breathe…
There is still no definitive answer to this one of nature’s most unfathomable mysteries. In scientific debates – oddly enough, there are specialists to discuss this subject -, the most accepted idea is that the zebra is a black animal…
Filter mats from the pet shop are usually colored blue. As a rule, the mats are 5 or 10 centimeters thick. There are fine and coarse pore size mats. Fine mats clog faster under high loads than coarse mats. Mechanical…
He was an Egyptian pharaoh who lived over 3,000 years ago. Today he is famous around the world and has become almost synonymous with ancient Egypt, but when he was in power he was a discreet pharaoh. So why has…
Data sheet Sundheim chickens Body weight (hen): 2.5 to 3.0 kg Body weight (rooster): 3.0 to 3.5kg eggs per year: 180 to 200 eggs Weight of an egg: 55g eggshell color: light brown (partly mottled) Origin: Germany Flight Skills: small…
READER QUESTION Alan Ferreira dos Santos, Sao Luis, MA He was a revolutionary who helped to establish a new political regime – one-party and socialist – in Cuba, which lasts until today. For many, Che is a martyr who opposed…
Data sheet eyespot cichlid German name: eyespot cichlid Scientific name: Heros liberifer, also Heros severus, Heros notatus, Cichlasoma severum Origin: South America Size: Body length up to 28 cm Aquarium Length: Length from 150 cm width and from 50 cm…
Let’s say it’s almost true, since less than 1% of tricolor cats are male and, even so, the result of a chromosomal anomaly. To understand how the color of a cat’s coat is defined, you must first know two things:…
Are crabs suitable for community tanks? In general, crabs should be better kept in a species aquarium. Many crustaceans eat fish or plants, for example. Smaller crustaceans, on the other hand, are threatened by larger fish. General information about crabs…
(/) More than 90 worldwide. Each country has its own collection, with some flavors being permanent and others being temporary special editions. In Brazil, in addition to the famous Orange and Grape versions, we already had the Mango, Melon, Strawberry,…