Can air stones, stress, bother or kill fish? Once you add an air stone to your aquarium, they most likely will never kill your fish. It is nearly impossible to have too much oxygen from a regular air stone.

The best way to test the amount of dissolved oxygen in your aquarium’s water is with a portable dissolved oxygen meter. After calibrating the meter, you can place a probe into the tank water, and read the results on the digital display.

The most telling sign that your fish need more oxygen is if you see them gasping at the surface — they will also tend to hang out back by the filter output. This area of your tank tends to possess the highest oxygen concentration as it is near the most disturbed surface.

about two days

Keep in mind that if your fish are living in a small container such as a bowl, they might lack enough oxygen. If the water is moving properly, it is clean, the temperature is low and the aquarium tank is wide enough, you do not need an air pump because the oxygen will be enough for your fish.

Will My Fish Die If I Turn off the Aquarium Filter Often? Your fish will not be affected if you turn off the filter every once in a while. The bacteria living in your filter will also not die if the filter is turned off sometimes. Make sure to maintain your fish tank and filter so that your fish remain healthy.

Best Fish For A Bowl Without Filter

• Betta fish (Use a heater)
• Guppies.
• White Cloud Minnows.
• Blind Cave Tetras.
• Salt and Pepper Corydoras.
• Zebra Danios.
• Ember Tetra.
• Pea Pufferfish.

Your goldfish can live very well without an air pump, but you must keep the bowl or tank clean and include pebbles.

Neon Tetra size 1.5 inch on an average. And even if you plan to keep three Neon Tetras in a fishbowl, you require a 5-gallon bowl. But since the fishbowl is too small, you shall lack the filtration system within it. All in all, the Neon Tetra can not survive in a fishbowl unless they are of an appropriate size.

They can have a lifespan of as long as ten years, or normally two to three years in aquarium. They are shoaling fish and must be kept in groups of at least 6 but will be more active in groups of 8-12 or more. Neon tetras are best kept in a densely planted tank to resemble their native Amazon environments.

Neon tetra disease is a condition caused by a Microsporidian parasite that’s more common than aquarium enthusiasts realize. It is a degenerative disease, which means it starts off slow but progresses quickly to become severe. This disease is one of the leading causes for dying neon tetras.