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Green water is an algae infestation that is suspended in aquarium water. It does not settle on surfaces. They are typically of the genera Chlorella, Ankistrodesmus, and Scenedesmus. It is a very common infestation to have in newly established aquaria, but may also occur after temperature swings or nutrient imbalances. [7] Once established ...
The green scum shown in this image is the algae bloom in Lake Erie. Within aquatic ecosystems, algae assumes a pivotal role by utilizing photosynthesis to transform water and carbon dioxide into sugar, concurrently releasing oxygen as a by-product. However, inadequate management can create significant environmental consequences.
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]
In these systems, algae act as a nutrient sink, absorbing excess nutrients, which helps maintain optimal water quality and reduces the risk of nutrient imbalances. [35] However, not all aquaponic systems utilize algae in this way; in other types of systems, algae in the fish tank are considered a nuisance that needs to be controlled.
Krill feeding in a high phytoplankton concentration (slowed by a factor of 12). Filter feeders are aquatic animals that acquire nutrients by feeding on organic matters, food particles or smaller organisms (bacteria, microalgae and zooplanktons) suspended in water, typically by having the water pass over or through a specialized filtering organ that sieves out and/or traps solids.
Algae can be used to capture fertilizers in runoff from farms. When subsequently harvested, the enriched algae can be used as fertilizer. Aquaria and ponds can be filtered using algae, which absorb nutrients from the water in a device called an algae scrubber, also known as an algae turf scrubber. [129] [130]
Rarely seen in the hobby and can be found in dim habitats in the wild. The algae is excellent at stripping a tank of nutrients so it must be carefully monitored. Two varieties exist, one with smooth, round blades and the other with concave blades. Was known as Caulerpa peltata and also may be called Saucer algae and Mushroom algae. [39] [38] [40]
In the case of a low tech aquarium, a layer of potting soil or root tabs is commonly put under the substrate to provide nutrients for the plants. [6] A biotope aquarium is an aquarium that is designed to simulate a natural habitat, with the fish, plants, and furnishings all representative of a particular place in nature. [5]
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