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For freshwater aquaria, gravel is the most common substrate. To prevent damage to fish, gravel should not be sharp. Aquarium gravel can be as coarse as pea-sized or as fine as 1–2 mm. [1] It is available in a number of colors, and may be naturally colored or dyed, and may have a polymer seal to ensure it does not affect water chemistry. [1]
Substrate is also useful for burrowing species as they can dig into the substrate as they would in their natural habitat. It is also useful for egg laying species that would naturally bury their eggs in the earth floor. The substrate also adds to the aesthetics of the enclosure and gives the vivarium a more natural feel and look. [1]
Symphysodon (colloquially known as discus or discus fish) is a genus of cichlids native to the Amazon river basin in Brazil.Due to their distinctive shape, calm behavior, many bright colors and patterns, and dedicated parenting techniques, discus are popular as freshwater aquarium fish, and their aquaculture in several countries in Asia (notably Thailand) [1] is a major industry.
Many color and tail pattern varieties exist. They generally need a ratio of 1 male to 2 females or more. All guppies and mollies are hardy fish that tolerate lower oxygen levels and temperatures than most aquarium fish, give birth to live young, and readily breed in home tanks. [58] can live in full sea water [59] 66 °F - 84 °F (19 °C - 29 °C)
The bluestreak cleaner wrasse (Labroides dimidiatus) is one of several species of cleaner wrasses found on coral reefs from Eastern Africa and the Red Sea to French Polynesia. Like other cleaner wrasses, it eats parasites and dead tissue off larger fishes ' skin in a mutualistic relationship that provides food and protection for the wrasse ...
The taxonomy is disputed, but FishBase follows a review of the genus from 2006. [2] [8] In 2007 it was suggested that the correct scientific name of the blue/brown discus is S. haraldi, whereas S. aequifasciatus is the correct name for the green discus. [5]
The shells of Discus rotundatus in the adult stage measure 5.7–7 millimetres (0.22–0.28 in) in diameter and 2.4–6 millimetres (0.094–0.236 in) in height. [3] Shells are reddish brown with darker cross bands, flat and densely ribbed.
The resulting mixture is used to clean organic residues off substrates, for example silicon wafers. [1] Because the mixture is a strong oxidizing agent , it will decompose most organic matter , and it will also hydroxylate most surfaces (by adding –OH groups), making them highly hydrophilic (water-compatible).