How many fish can a 90 liter aquarium hold?

The number of fish that a 90-liter aquarium can hold depends on various factors such as the size, species, and compatibility of the fish, as well as the filtration and aeration systems in place. As a general guideline, a 90-liter aquarium can comfortably accommodate:

- Approximately 10-12 small-sized fish, such as neon tetras, guppies, or cardinal tetras.

- Around 6-8 medium-sized fish, such as zebra danios, platy, or mollies.

- Up to 4-5 larger-sized fish, such as angelfish, gouramis, or dwarf cichlids.

It's important to consider the specific needs and compatibility of the chosen fish species to ensure their well-being in the aquarium. Overcrowding can lead to water quality issues, increased stress, and potential aggression among fish. Additionally, proper filtration, aeration, and regular water changes are essential for maintaining a healthy aquatic environment.