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[6] [better source needed] Infestations may occur after nitrogen spikes in the water. [5] It is often seen in newly established aquaria and can also be a symptom of low carbon dioxide and nutrient levels in the water. [3] Green water is an algae infestation that is suspended in aquarium water. It does not settle on surfaces.
An improper nitrogen cycle, inappropriate aquarium plants and potentially harmful freshwater invertebrates can directly harm or add to the stresses on ornamental fish in a tank. Despite this, many diseases in captive fish can be avoided or prevented through proper water conditions and a well-adjusted ecosystem within the tank.
Cyanobacteria (blue-green algae) bloom on Lake Erie (United States) in 2009. These kinds of algae can cause harmful algal bloom. A harmful algal bloom (HAB), or excessive algae growth, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, water deoxygenation, mechanical damage to other organisms, or by other means.
When water levels rise, it allows many fish access to areas further upstream, that are better suited for reproduction, that were not previously accessible. This can be a dangerous strategy, as if they wait too long, they may get trapped in small pockets of water, and die when the levels recede.
Fish kills can also result from a dramatic or prolonged drop in air (and thus, water) temperature. This kind of fish kill is selective – usually the dead fish are species that cannot tolerate cold. This has been observed in cases where a fish native to a more tropical region has been introduced to cooler waters, such as the introduction of ...
In most aquarium tanks, the fish are at high concentrations and the volume of water is limited. This means that communicable diseases can spread rapidly to most or all fish in a tank. An improper nitrogen cycle , inappropriate aquarium plants and potentially harmful freshwater invertebrates can directly harm or add to the stresses on ornamental ...
Traditionally, when fish would exhibit dropsy, it was advised to “destroy” it. [2] However recently, it is recommended to “bathe” the fish in water that has aquarium or epsom salts dissolved in it, as the process of osmosis may help relieve pressure on the fish. Antibiotics may destroy or weaken the pathogen if it is bacterial so that ...
The following is a list of aquarium diseases. Aquarium fish are often susceptible to numerous diseases , due to the artificially limited and concentrated environment. New fish can sometimes introduce diseases to aquaria, and these can be difficult to diagnose and treat.