Reefamorous Acclimation Guide

Acclimation Guide

How to Safely Introduce Corals, Marine Fish & Invertebrates to Your Aquarium

Bringing new livestock into your aquarium is one of the most exciting parts of reef keeping—but it is also one of the most critical. A careful acclimation process helps protect new arrivals from sudden changes in temperature, salinity, pH, and other water conditions.

⚠️

Before You Begin

Make sure your aquarium is ready before introducing any new livestock.

✓The aquarium is fully cycled.
✓Temperature, salinity, and pH are stable.
✓Ammonia and nitrite are both at 0 ppm.
✓Proper lighting is installed, especially for corals.

Never rush acclimation. A slow, controlled transition gives livestock the best chance to adapt safely.

1
All Livestock

Temperature Acclimation

  1. Turn off the aquarium lights to reduce stress.
  2. Keep the transport bag sealed.
  3. Float the sealed bag in the aquarium for approximately 15–20 minutes.
  4. Allow the water inside the bag to gradually reach the same temperature as the aquarium.
✅ Do not open the bag during the temperature acclimation stage.
2
Recommended Method

Drip Acclimation

Drip acclimation is one of the safest ways to gradually adjust marine livestock to the water chemistry of your aquarium.

🧰 What You Need

  • A clean bucket or dedicated container
  • Airline tubing
  • A small valve or loose knot to control flow
  • A net or specimen container for transfer

💧 Drip Acclimation Steps

  1. Open the bag and gently pour the livestock and transport water into a clean container.
  2. Use airline tubing to start a siphon from the aquarium into the container.
  3. Adjust the flow to approximately 2–4 drops per second.
  4. Allow the water volume in the container to double, usually within 30–60 minutes.
  5. For sensitive species, discard half of the water and repeat the process once more.
Use only clean, aquarium-safe equipment. Containers or tubing exposed to soap, chemicals, or cleaning products should never be used.

Species-Specific Acclimation Guidelines

Different types of marine livestock respond differently to changes in water chemistry, handling, lighting, and exposure to air.

🐟 Marine Fish

Reduce stress and avoid introducing transport water.

Recommended time: 30–45 minutes
  • Fish can be affected by ammonia buildup inside the transport bag.
  • Once the bag is opened, begin acclimation without unnecessary delay.
  • Use a net or specimen container to transfer the fish.
  • Never pour transport water into the aquarium.
After introduction: Keep the aquarium lights off or dimmed for a few hours to help the fish settle.

🌿 Corals

Acclimate to both water chemistry and light intensity.

Recommended time: 45–90 minutes

Corals can be especially sensitive to:

  • Salinity changes
  • Temperature shifts
  • Sudden changes in light intensity
Coral dipping: Before placing a coral in the display aquarium, use an appropriate coral dip according to the product instructions to help remove unwanted pests and hitchhikers.
Light acclimation: Begin in a lower-light area and gradually move the coral toward its final position over approximately 5–7 days.

🦐 Invertebrates

Shrimp, snails, crabs, starfish, and other sensitive species.

Recommended time: 60–120 minutes
  • Use a slow and consistent drip rate.
  • Pay close attention to salinity differences.
  • Avoid rapid changes in water conditions.
  • Do not expose air-sensitive animals, especially starfish, to air.
Invertebrates are often less tolerant of sudden salinity changes than marine fish. When in doubt, acclimate more slowly.

Common Acclimation Mistakes to Avoid

✕Skipping acclimation entirely
✕Pouring store or transport water into the aquarium
✕Rushing the acclimation process
✕Exposing sensitive invertebrates to air
✕Placing new corals immediately under intense lighting
✕Using containers contaminated with soap or chemicals

Reefamorous Pro Tips

Match salinity before purchase Ask about the livestock system salinity and compare it with your aquarium whenever possible.
Quarantine marine fish Use a proper quarantine system to reduce the risk of introducing parasites or disease.
Observe for 24–48 hours Watch for abnormal breathing, poor extension, loss of balance, or unusual behavior.
Feed lightly Allow new arrivals time to settle before offering a small, appropriate feeding.

Recommended Marine Aquarium Parameters

Exact requirements may vary by species, but these ranges are suitable targets for many reef aquariums.

Parameter Recommended Range
Temperature 24–26°C
Salinity 1.024–1.026 specific gravity
pH 8.1–8.4
Ammonia 0 ppm
Nitrite 0 ppm

Give Every New Arrival the Best Possible Start

Proper acclimation is not optional—it is an essential part of responsible reef keeping. By taking the time to adjust new fish, corals, and invertebrates carefully, you can reduce stress, improve survival, and support long-term health. At Reefamorous, we are committed to helping you build and maintain a thriving reef ecosystem.