Aquarium Care Guides

Healthy fish start with a healthy aquarium

Good aquarium care is about consistency. Set up a stable environment, learn the needs of each species, and make small, regular adjustments instead of waiting for problems to appear.

Before adding fish

  1. Choose the right aquarium size. Match the tank to the adult size, activity level, and number of fish.
  2. Cycle the aquarium. Establish beneficial bacteria and test for safe ammonia and nitrite levels before adding livestock.
  3. Use suitable equipment. Choose appropriate filtration, heating when required, a thermometer, and species-appropriate lighting.
  4. Research compatibility. Check temperament, adult size, temperature, pH, hardness, and space requirements before combining species.

Acclimating new fish

Dim the aquarium lights and follow the seller’s acclimation instructions. Gradually adjust the fish to the aquarium water, transfer it gently, and avoid adding shipping water to the tank. Keep the lights low and observe the fish closely after introduction.

Water quality and maintenance

  • Test water regularly, especially after setup or adding livestock.
  • Perform consistent partial water changes with properly conditioned water matched to the aquarium temperature.
  • Remove uneaten food and debris, and clean equipment without removing all beneficial bacteria.
  • Watch for cloudy water, unusual odors, leaks, or sudden temperature changes.

Feeding

Feed a varied, species-appropriate diet in small portions. Offer only what fish can eat in a few minutes and remove excess food.

Quarantine and observation

When possible, quarantine new fish before adding them to an established aquarium. Watch for unusual breathing, spots, torn fins, loss of appetite, hiding, or other changes in behavior.

Important reminder

Every species has its own care requirements. Research each fish before purchase and adjust temperature, water chemistry, diet, tank size, and tank mates to suit that species.