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Polycentrus schomburgkii is sometimes kept as an aquarium fish, where its small size allows for tanks as small as ten gallons in size. Like other South American leaffishes (and numerous other leaf-like fishes, for that matter) it is an ambush predator that floats motionless among plants until a smaller fish swims close enough for it to swallow. [2]
A buffer solution is a solution where the pH does not change significantly on dilution or if an acid or base is added at constant temperature. [1] Its pH changes very little when a small amount of strong acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical ...
Cabomba aquatica is also important in the aquatic ecosystem because it acts as an efficient accumulator of heavy metals in water bodies. This plant has great potential for the phytoremediation of water with heavy metals. Other aquatic plants that may serve the same purpose include: Vallisneria spiralis and Echinodorus cordifolius.
Aquatic plants are used to give the freshwater aquarium a natural appearance, oxygenate the water, absorb ammonia, and provide habitat for fish, especially fry (babies) and for invertebrates. Some aquarium fish and invertebrates also eat live plants. Hobbyists use aquatic plants for aquascaping, of several aesthetic styles.
When an acid is dissolved in water, the pH will be less than 7, while a base, or alkali, will have a pH greater than 7. A strong acid, such as hydrochloric acid , at concentration 1 mol dm −3 has a pH of 0, while a strong alkali like sodium hydroxide , at the same concentration, has a pH of 14.
Encrusting fan-leaf algae: Lobophora sp. Moderate [7] Moderate [7] Good [7] Low-Moderate [7] Low-Moderate [7] Somewhat [7] This algae is very similar to Scroll algae although it is not calcified, being rubbery to the touch. It comes in various shades of brown and green and because it comes from deep waters, it requires little lighting.
For a tropical fish tank, maintaining a warm environmental temperature ranging between 75 and 86 °F (24 to 30 °C) enables different tropical fish to thrive at different temperatures. [2] Aquarium substrate usually consists of sand or gravel. Aquarium substrate is important for the fish's health and replicating their natural environment.
The substrate can vary from sand to gravel, but many aquarists choose crushed coral or aragonite sand, both of which help raise the hardness and pH to an acceptable level. Many brackish water fish, as any fish, can jump out of the tank, so it must be covered. Some brackish water species come from estuaries.
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