28 Aug 2026 · By My Aquarium Fish
Live delivery is only half the journey. Acclimation decides whether new fish settle calmly or stay stressed through the first night. Take your time even when you are excited to see them swim after you buy aquarium fish online in India.
Keep the room calm. Dim tank lights, avoid chasing fish with a net more than needed, and make sure filter flow is not blasting a tiny release area. Float the sealed bag first so temperatures match.
After floating, open the bag and gradually mix tank water into the bag water, or use a drip line for delicate species. Never dump cold or warm shipping water straight into a stable aquarium.
Net the fish in and discard the bag water. Feed lightly later, not immediately. Watch for clamped fins, rapid breathing or hiding — mild stress is common; ongoing distress may need water checks and aquarium support via contact.
If you ordered plants or hardscape with the fish, give newcomers cover right away. A calmer first evening is one of the best gifts you can give livestock bought online.
Step-by-step
- Dim lights and prepare the tank. Turn aquarium lights down, confirm temperature is stable, and have a clean container ready for floating the sealed bag.
- Float the sealed bag. Float the unopened bag for 15–20 minutes so bag water and tank water temperatures equalise.
- Introduce tank water gradually. Open the bag and add small amounts of tank water over 20–30 minutes, or use a slow drip method for sensitive fish.
- Net fish into the aquarium. Net fish into the tank and discard bag water. Do not pour shipping water into your display aquarium.
- Observe quietly. Keep lights low, avoid heavy feeding on day one, and watch breathing and swimming for the first evening.