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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]
Adults generally weigh 150–250 g (5.3–8.8 oz). [18] Discus fish exhibit no sexual dimorphism when they are under about 4 inches in size, making it difficult to distinguish between males and females at a young age. Once they reach this size, the shape of their dorsal fins begins to change, with females retaining rounder dorsal fins and males ...
The cherry barb's natural habitat is a heavily shaded, shallow, and calm water body. Its native substrate is silty with leaf cover. It comes from a tropical climate and prefers water with a pH of 6 to 8, a water hardness ( dH ) of 5 to 19, and a temperature range of 73 to 81 °F (23 to 27 °C).
Tank size Temperature range pH range Water Hardness Bristlenose pleco, bushynose pleco: Ancistrus spp. The bristlenose genus has at least 59 identified species and many others yet to be named. [16] Males and female both have long "bristles" on their nose, the males having distinctly longer ones. 72-84 F (20-27 C) Adonis pleco, polka dot lyre ...
[7] [8] The species reaches sexual maturity around one year of age, [16] and continues to reproduce for 9–10 years. [16] Frequency and timing of spawning may be related to the occurrence of rain. [17] A. ocellatus fish are biparental substrate spawners, though detailed information regarding their reproduction in the wild is scarce. Young ...
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 term is used in a similar sense in synthetic and organic chemistry, where the substrate is the chemical of interest that is being modified. In biochemistry, an enzyme substrate is the material upon which an enzyme acts. When referring to Le Chatelier's principle, the substrate is the reagent whose concentration is changed.
The green discus is found in blackwater habitats with a high temperature of 27–30 °C (81–86 °F) and low pH of 4.8–5.9. [4] Although also known from whitewater , its preference for lentic habitats such as floodplains means that the water contain little suspended material (unlike main sections of whitewater rivers).