When you buy an aquarium, you will notice that there are different sizes, from the smallest ones of just a few liters to the huge ones that need a table dedicated exclusively to them. These large specimens allow you to create a mini habitat where marine life is recreated with fish and plants. However, one of the most common questions when choosing an aquarium is: How many fish can we put in it?
The size of the aquarium, even if it is considerable, does not always give an obvious answer. The fish we buy are usually small and tend to grow, so it is vital to think ahead and make sure they have enough space to develop properly.
Factors to consider when calculating how many fish fit in an aquarium
There are several key factors to consider that influence the amount de peces that you can have in an aquarium. A simple calculation based on the size of the fish tank is not enough; you have to consider aspects such as:
- Fish size: Fish grow, and some grow quite a bit. A small fish may need much more space when it reaches its adult size.
- Species compatibility: Not all fish can coexist peacefully. Some species are more territorial or aggressive.
- Biological load: Fish generate waste, which affects water quality. The filtration system must be powerful enough to handle this load.
- Plants and decorations: These items take up space and must also be taken into account when calculating the net volume of the aquarium.
How many fish can fit in a 60 litre aquarium?
One of the common rules for determining capacity de peces in an aquarium is the rule of centimeter of fish per liter of waterThis rule suggests that for every centimetre that a fish measures in its adult state, you should allocate one litre of water. For example, if an adult guppy measures 3 cm, it will need approximately 3 litres of water, which allows for around 20 guppies to be housed in a 60 litre aquarium.
However, this calculation is merely indicative. It does not consider factors such as the amount of plants and decorations or the biological load generated by each type of fish. In addition, some species generate more waste than others, which can influence both the water quality and the final number. de peces that the tank can hold.
In my case, I have a 60 litre aquarium, and the person in charge of the store recommended that I not put more than 10 to 12 small fish in, as they grow and need enough space to develop. Overcrowding can cause stress and disease, so it is crucial to not only think about the space available now, but also about the future of the fish.
The role of the filter in fish survival
One of the most important elements in any aquarium is the filtration system. Not only is it responsible for removing waste generated by the fish, but it also helps maintain proper oxygen levels in the water.
There are two main types of filters that are typically recommended for aquariums of this size:
- Backpack or cascade filter: This type of filter is ideal for small or medium-sized aquariums. It is easy to install and helps keep the water moving, promoting oxygenation.
- External filter: If you have a larger amount de peces or larger fish tanks, an external filter may be more suitable as it handles a higher biological load and offers more efficient filtration.
The filter should be chosen based on the amount de peces and the capacity of the aquarium, to ensure that the water remains clean and with the oxygen levels necessary for the health of the fish.
Species Compatibility: Which Fish Should You Choose?
The choice of fish should also be based on their compatibility. Not all species can coexist, either because of their aggressiveness or because of their specific needs in terms of temperature, pH or water hardness. Some species are territorial and will become aggressive if they do not have enough space.
For a 60 litre aquarium, some recommended combinations might include:
- guppy: Whimsical but peaceful fish, ideal for a community aquarium.
- Platy's: Very hardy and peaceful, and they come in a wide range of colors.
- Neon Signs: Colorful and peaceful fish that prefer to live in groups or schools.
- Corydoras: They are perfect for cleaning the bottom of the aquarium and are completely peaceful.
If you plan to keep multiple species, do detailed research to ensure their needs are compatible and that they won't be stressed by lack of space.
Fish growth and long-term planning
Every fish has a different growth rate, and it's important to consider how much your fish will grow from the time you buy it until it reaches its adult size. A common mistake is to fill an aquarium with small fish without considering how much larger they will become in the future.
For example, if you buy 10 small guppies, and each grows to 5cm, a 60 litre tank can quickly become overcrowded, especially if they breed. It is essential to plan ahead well and, when necessary, consider changing the size of your tank or reducing the number of de peces.
Consequences of overpopulation in aquariums
One of the main mistakes made by novice hobbyists is overpopulating their aquariums. This not only creates stress among the fish, but also has a negative impact on the water quality and overall health of the aquarium inhabitants. Some of the consequences of overpopulation are:
- poor water quality:The more fish there are, the more waste is generated, which can exceed the filter's ability to keep the water clean.
- Stress in fish: Lack of sufficient space generates fights over territory and stress in the fish.
- Decreased available oxygen:In an overcrowded aquarium, fish will consume oxygen in the water quickly, which can be detrimental to species that require higher levels of this element.
To avoid these problems, it is essential to be patient and not overpopulate the aquarium, as well as regularly monitoring the levels of ammonia, nitrites and nitrates.
Ultimately, the success of a balanced aquarium lies in long-term planning, having the right equipment (filters, heaters, etc.), and paying close attention to both fish behavior and water conditions to ensure a healthy and enjoyable environment.