@all When it comes to rearing fish in an aquarium, there is a recommended rule of thumb for the minimum tank size based on the fish's adult size. However, it's important to note that tilapia can grow quite large, and considering the adult size of the fish is crucial for their well-being.

Tilapia can reach sizes ranging from 15 to 60 centimeters in length, depending on the species. To provide adequate space for your tilapia, it's generally recommended to have a tank capacity of at least 10 gallons (approximately 38 liters) per adult tilapia fish. This rule of thumb helps ensure proper swimming space, water quality, and overall health of the fish.

Given that you have 10 tilapia fish, each weighing about 100 grams, it's difficult to estimate their adult size without knowing the specific species. However, assuming they are Nile tilapia (Oreochromis niloticus), which is commonly farmed and can grow to a size of around 30 centimeters, you would need a tank with a minimum capacity of approximately 100 gallons (380 liters) to accommodate all 10 fish comfortably.

Keep in mind that these are general recommendations, and it's always best to provide more space if possible. Additionally, factors like filtration, aeration, and maintaining water quality are crucial for the health and well-being of your tilapia. Regular monitoring of water parameters, such as temperature, pH, ammonia, nitrite, and nitrate levels, is essential for their optimal growth and survival.

If you plan to rear tilapia in an aquarium, ensure that the tank is properly equipped with appropriate filtration systems, aeration, and suitable environmental conditions (e.g., temperature, lighting). Providing hiding spots or structures, such as plants or artificial structures, can also help mimic their natural habitat and reduce stress.

It's worth mentioning that tilapia are often reared in larger-scale aquaculture systems, such as ponds or recirculating aquaculture systems (RAS), which can provide more space and better control over water quality. If you have the means, considering a larger-scale system may be more suitable for long-term tilapia rearing.

Remember to research the specific requirements of the tilapia species you are working with, as different species may have specific needs regarding temperature, water quality, and tank dimensions.

When determining the best aquarium dimensions for rearing fish, several factors should be considered, including the number and size of the fish, their behaviour and swimming patterns, and the overall requirements for their well-being. While tilapia can tolerate a wide range of conditions, it's important to provide them with sufficient space to swim and thrive. Here are some general guidelines to consider:

Remember that these are general guidelines, and it's always best to research the specific requirements for the tilapia species you intend to rear. Additionally, consider factors such as lighting, hiding spots, and decor to create a stimulating and comfortable environment for your fish.

Dear Amr,

the colleagues have already pointed to a number of useful criteria. The single most important point for holding healthy fish in an aquarium and make them grow is high oxygen supply and keeping ammonium from accumulating. I remember seeing carps being fattened in an aquarium which became after a while too small for them to turn around, but it was forcefully oxygen-enriched.

All animals breathing in water need to spend a lot of their energy for gas exchange as water is a significantly denser medium than the air we breathe. In addition, the warmer the water, the less oxygen can be naturally resolved.

Incidentally, this is the reason why we observe poleward migration of tropical and subtropical species in a warming ocean. Also a fish species attains a lower maximum size in the warmer parts of its distribution range compared to the colder parts. You can counter this known constraint either by higher throughput of well-oxygenated water or by enriching with water directly with oxygen or at least heavy aeriation.

Hope that helps a bit.