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What causes fish kills? Many, but not all, fish kills in the summer result from low concentrations of dissolved oxygen in the water. Fish, like all other complex life forms, need oxygen to survive. They get theirs in the form of oxygen gas dissolved in the water. That’s why it’s important to have an aeration device, a bubbler, in your home aquarium.
So your fish are dying, and you don’t know why? We go over 11 common reasons why your fish have kicked the bucket.
More commonly, the fish kills that have been reported have been large-scale kills of many species of fish. These fish kills have usually occurred as a result of algal blooms and subsequent death of the algae, resulting in reductions in dissolved oxygen in the water.
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Stress: Stress is the number-one killer of aquarium fish. Lack of Tank Preparation: Failure to cycle a new tank can cause problems.
New Tank Syndrome: Before a tank has developed the appropriate chemistry to support healthy fish, heavy concentrations of nitrates and ammonium…
There are various reasons why the fish in your tank may keep on dying. Some of these reasons include overcrowding, diseases/infections, stress,…Duration: Posted:
When fish die in large numbers, it’s officially called a “fish kill”. These events can have a variety of causes, but among the most common…Duration: Posted:
Of known causes, fish kills are most frequently caused by pollution from agricultural runoff or biotoxins. Ecological hypoxia (oxygen depletion) is one of the…
A sudden appearance of dead fish in a lake or pond causes considerable … It is not uncommon for many of the larger fish to die, since they need more.
Fish mortality in ponds is a natural process, and noticing the occasional dead fish along shoreline areas is not unusual. However, when large numbers of dead fish are observed at one time, there is reason for concern.
It does not matter how slowly you try to make the fish adapt the new temperature, tropical fish (such as betta) will die if there is no heater to keep the water at the tropical water temperature which is usually around mid 70~80F+. Most aquarium fish sold at the shops are tropical.
If you have a bully in the tank it may be picking on the smallest/weakest fish causing it to stress out and die. That would explain them hiding by the heater and dying one at a time. #6