You've lovingly set up your aquarium, the water values are perfect, and the cycling phase is finally over. Now comes the crucial question: How many shrimp should actually move in?
Too many animals can strain the system at the beginning, too few mean you barely get to see the agile inhabitants. Here you'll learn how to find the golden mean.
The Rule of Thumb: The 1-Liter Principle
If you're looking for a rough guide, there's a simple general rule that many aquarists follow:
You can count on approximately 1 shrimp per 1 liter of aquarium water.
For common nano aquariums, this means:
- 10-liter cube: approx. 10 shrimp
- 20-liter cube: approx. 20 shrimp
- 30-liter cube: approx. 30 shrimp
Why Group Size is Important at the Start
Shrimp are extremely social animals. In nature, they live in huge groups. If you only introduce two or three animals, they will feel insecure, show themselves less often, and be more susceptible to stress.
Why you should start with at least 15 shrimp
Although theoretically, you could start with fewer animals in a 10-liter tank, we recommend a group of at least 15 shrimp for a healthy start.
There are three crucial reasons for this:
- Safety & Well-being: Dwarf shrimp are extremely social group animals. In a group of at least 15 animals, they feel safe. If there are too few, they hide permanently and are under stress, which can weaken their immune system.
- The matter of offspring: Statistically, with 15 animals, the chance is almost guaranteed that both sexes (male and female) are present. With too small a group, it can happen that you only get one sex – and the wait for offspring remains unsuccessful.
- Visibility in the tank: In a planted aquarium, the animals quickly spread out. To truly observe the fascinating interactions of your new inhabitants, a starting group of 15 animals is ideal.
What happens if there are more?
Don't worry: If your shrimp feel good, they will reproduce. Dwarf shrimp regulate their population to a certain extent themselves.
