House of Fins, a store for aquarium hobbyists located in Greenwich, Connecticut, operates under the leadership of Robert Bray. In addition to selling aquarium supplies and fish, House of Fins also helps people get started with their own aquariums and provides advice for situations that might arise, such as issues with the level of oxygen in the water.

1. How to Deal with Oxygen
Problems in an Aquarium
By House of Fins

2. Introduction
• House of Fins, a store for aquarium hobbyists located in
Greenwich, Connecticut, operates under the leadership
of Robert Bray. In addition to selling aquarium supplies
and fish, House of Fins also helps people get started with
their own aquariums and provides advice for situations
that might arise, such as issues with the level of oxygen
in the water.
Fish need oxygen to live, and there a number of signs
that might indicate that oxygen levels in the tank are too
low. For instance, the fish might stay near the surface in
order to get oxygen rather than swimming around in the
deeper parts of the tank. The fish might also stay close to
objects in the tank that give off bubbles of air.

3. Oxygen in Aquariums
• A number of conditions might be to blame for fish
having difficulty getting oxygen. For instance,
having more fish in the tank than the size of the tank
can support can lead to this issue. The problem
might also stem from water that has become too
warm or from other issues related to water quality.
Giving the fish too much food, for example, can
cloud up the water and interfere with the tank
environment. In some cases, the aquarium might
require a different filter that circulates water in the
tank more effectively. If you are unsure of the cause
of the problem, consult a person knowledgeable
about aquariums for guidance.