Come Allestire un Acquario per Betta: Guida Completa per Principianti

How to Set Up a Betta Fish Tank: A Complete Beginner's Guide

Valerio Chiaradonna

The Betta splendens, known as the fighting fish, deserves a well-designed aquarium to thrive and showcase its vibrant colors. This detailed, step-by-step guide explains how to create an ideal habitat, avoiding common pitfalls like tiny bowls or cold water.

Choosing the Right Tub

Start with a rectangular tank of at least 20-30 liters for a single Betta, preferably long and shallow (maximum height 25-30 cm). Larger tanks stabilize water parameters and reduce stress.

  • Avoid bowls smaller than 15 liters: they cause toxin buildup and torn fins.
  • Place the aquarium away from drafts, direct sunlight, and heat sources.

Essential Equipment

A basic setup includes a filter, heater, and thermometer to recreate the Betta's tropical Asian environment.

Component Function Recommendation
Internal filter Low flow biological cleaning Adjustable sponge or mini filter 
Heater Constant temperature 24-27°C 25W for 20-30 liters 
Thermometer Precise control Digital sticker
LED lighting Light cycle 8-10 hours/day Automatic timer 


Connect everything before filling the tub.

Natural Background and Furnishings

Spread 2-3 cm of fine gravel or dark inert sand on the bottom for a natural look and easy cleaning.

  • Add driftwood, smooth rocks
  • Create visual barriers to reduce aggression.
  • Avoid sharp objects that damage the fins.

These structures mimic the Asian biotope, making the Betta less stressed.

Plants and Safe Decor

Live plants improve water quality and provide shelter, essential for beginners.

  • Low light : Anubias, Java moss, Java ferns tied to driftwood.
  • Floating : Pistia stratiotes or limnobium for shallow shade.
  • Fast : Limnophila sessilifora or Elodea to absorb nitrates.

Secure the plants with fishing line, avoiding toxic glue. No hard plastic.

Preparing and Cycling Water

Fill the tank 70% with RO water and 30% with tap water. Set the pH to 6.5-7.5, GH 4-8, and KH 3-6.

  1. Turn on the filter and heater.
  2. Add starter bacteria to speed up the cycle.
  3. Test weekly: ammonia 0, nitrites 0, nitrates <20 ppm.

Cycling lasts 2-4 weeks: only then is the tank safe.

Introducing the Betta

Buy an active Betta with open fins and bright colors from reliable sources.

  • Float the bag for 15-20 minutes to equalize the temperature.
  • Add bath water gradually over 30-45 min.
  • Release the fish in the evening, turn off the lights for 24 hours.

Keep it alone: ​​no guppies or fast fish that stress it.

Daily Nutrition

Feed 1-2 times a day with tiny portions that can be finished within 2 minutes.

  • Base: Betta-specific pellets (high in protein).
  • Supplements: frozen artemia, mosquito larvae, bloodworms.
  • Weekly fasting for digestive health.

Remove residues to avoid pollution.

Weekly Maintenance

Keep your aquarium clean with simple routines.

  • Change 20-30% of the water every 7-10 days, at the same temperature.
  • Bottom siphon, glass cleaner with magnet.
  • Rinse filter sponges in tub water.

Observe the Betta: healthy fins and active swimming indicate well-being.

Mistakes to Avoid

Many beginners make missteps that shorten the life of the Betta (up to 3-5 years in the correct tank).

  • No cold water (<24°C) or no filter.
  • No overcrowding or fake plants.
  • No skipped cycle: causes poisoning.

Visit Animal Instinct Rome

Ready to get started? At Animal Instinct on Via di Monteverde, Rome, we offer complete Betta kits, live plants, and personalized advice. Book a consultation or order online for your perfect aquarium! Contact us today for your happy betta.

Back to blog

Leave a comment