Marine fish require a saltwater tank with stable salinity levels, pristine water quality, and adequate filtration. Regular testing for salinity, pH, and nitrate levels is crucial to ensure the health of your marine aquarium. Additionally, consider investing in a protein skimmer and live rock to enhance the filtration process and replicate the oceanic environment.

When creating a community tank, it's important to choose fish species that have similar requirements in terms of water temperature, pH, and tank size. Research each species' temperament to avoid aggression. Pairing peaceful species such as tetras, guppies, and rasboras can often make for a harmonious community aquarium.

Selecting the right aquatic plants for your tank involves considering factors like lighting, substrate, and compatibility with your fish species. Low-light plants like Java Fern and Anubias are suitable for beginners, whereas more experienced aquarists might opt for plants that require higher lighting conditions. Aquatic plants not only beautify your tank but also provide essential oxygen and hiding spots for your fish.

Tank size is crucial for the well-being of your aquatic pets. Small fish like bettas and neon tetras can thrive in tanks as small as 5-10 gallons, while larger species, such as angelfish or certain marine species, require at least a 120-litre tank. Always research the specific needs of your chosen species to prevent overcrowding and ensure proper growth and health.