When do fish die

Cat View Products. Fish View Products. Small Animal View Products. Reptile View Products. Bird View Products. I have no idea what is killing everything off. I bought I pair of white mollies but the female fish died within 6 days. And I bought another female but it had also died the very next day.

Mollies are best when females outnumber males by at least two to one. The male may have harassed the female to death, then the following one. Mollies need a high pH and salt in the water. The pH may have been too low for them or the females were already sick when you bought them. I have a L tank. And my fiche die one by one. Start to spin around and then it is gone. What can be wrong. I lost 18 fish in about 3 weeks.

Spinning fish is usually down to Nitrite poisoning. To lose so many fish in such a short space of time I would still suspect water quality and New Tank Syndrome, but failing that, a parasitic infection or poisoning of the tank water from an external source. I had 6 neon tetras, 4 guppies and a betta in my tank. If ammonia and nitrite were anything above zero then it could be enough to stress and kill the fish.

If water quality was perfect in the new tank then the Betta may have killed the guppies, or the guppies may have been carrying a disease.

The Betta may have died from old age they are short lived, or from contracting disease from the guppies. I was given a 29 gallon top fin aquarium for Christmas and I set the tank up took my water got it tested and bought some glow tetras 3 then died with in 4 hours. We got 3 more fish same kind and they lasted about 5.

I switched all my water to natural spring water had my PH was reading high so I took care of that got 3 more glow tetras and they lasted about 7hrs. I retested water and decided to just let the take keep running empty of fish changed filter too.

For newly added fish to all die in such a short space of time I would look to source water or poisoning. Try emptying and refilling the tank with reverse osmosis water and a remineralising agent. Add some beneficial bacteria on the day you add the fish and test temperature, pH, ammonia, nitrite and nitrate daily for the first few weeks. If you still lose fish within hours of adding them then the cause could be a poison of sort sort either on the tank decor, or the tank itself, or in the room.

Avoid insecticides, air fresheners and any foreign non aquarium safe, objects which could be leaching into the water. I have a 45 L tank and left it running for almost two weeks before buying fish. Then I got a Bristlenose and 6 Mollies. Within 2 days I had baby Mollies and separated these for the main tank. Then I brought 3 Ram Cichlids which look quite settled and they getting their bright colours!

Then all of a sudden one of the Mollies died so I did a full clean of the tank but now all 3 Rams died in the same night and my Bristlenose died today!! Please can someone help!! It sounds like a water quality issue to me. Rams are sensitive but Bristlenose catfish are very hardy. To lose a Molly, the Rams and a Bristlenose sounds like you had an ammonia or nitrite spike.

A new aquarium can take weeks to cycle and fully mature, and within that time it should be stocked slowly with a few small, hardy fish, and the water tested regularly, and logged. Stick with the fish that are left and only consider adding more after a week or two of test results showing zero ammonia and nitrite. Bristlenose will outgrow a 45cm aquarium and really need one of 80cm or more. Rams need mature aquaria with a low pH and warmer than usual water.

What could be the reason they passed? It sounds like New Tank Syndrome to me. A new tank should be set up, filled with water, dechlorinated, brought to temperature and checked with a thermometer, then have beneficial bacteria added on the day that the first fish are added.

When we talk about water quality in your aquarium, we are referring to things like the pH levels in the water, the water filtration system, salinity, and the use of the wrong water type in your tank. If just one of the above factors is a little off, then your fish could suffer tremendously. Removing the old filter and installing a new one in the tank, regardless of whether the tank is already cycled or not is a big problem. To avoid filter issues in your aquarium, have the old filter and new filter running together in the tank for at least a week to help the new filter colonize.

You can add beneficial tank bacteria and water conditioners to the water to help the process along a little bit. Only once you are confident the new filter is ready, remove the old one from the tank. Water pH levels are equally as important as having a colonized aquarium filter.

High pH levels indicate that the water is alkaline, whereas low pH levels show acidity in the water. Aquarium plants and fish all have their preferred pH ranges, and not honoring that could cause fish death. There are a lot of things that can change the pH level in your water, including adding new fish to the tank. The more common reasons your pH levels may have been altered is due to adding chemicals to the water, changing the substrate, or tank decorations.

Certain substrates such as coral and limestone can dissolve into the water and change the pH levels dramatically. More often than not, these substrates are purchased and placed in the tank especially to do just that. Think of it this way: do fish swim in pristine, super clean water in the wild? The waste fish produce is broken down by beneficial bacteria in the tank. If there are no bacteria, or not enough of them in the aquarium, the ammonia levels in the water spike.

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. Warm water holds less dissolved oxygen than cold water, so summer is the time when fish can have a hard time getting enough oxygen.

Other organisms use oxygen, too, including the algae that grow in the summer and bacteria that degrade organic matter.

During the day, the algae produce oxygen through photosynthesis, but at night, when photosynthesis stops, they and other organisms keep respiring, using up oxygen. So on warm summer nights during algal blooms , the dissolved-oxygen concentration sometimes drops too low for the fish, and a die-off can occur.

This can occur as a result of purely natural conditions or because of human activity that results in adding nutrients, nitrogen and phosphorus , to water systems.