Setting Up Your First Coral Tank — Step by Step

A coral tank requires an even more stable environment than a fish-only marine tank. Taking your time and following the proper steps is the shortest path to success. Here's a 9-step guide to setting up a coral tank.

Step 1: Prepare Equipment

For coral keeping, prepare the following equipment. Compared to fish-only setups, you'll additionally need specialized lighting and a calcium reactor.

• Tank (60cm+ recommended, overflow system ideal)
• Full-spectrum marine LED light
• Protein skimmer
• Wavemakers (multiple recommended)
• Heater + thermostat
• Refractometer

Step 2: Choose Installation Location

Select a level, stable location away from direct sunlight. Always use an aquarium stand rated for the weight. A 60cm tank exceeds 80kg when filled. Check floor strength too.

Step 3: Arrange Live Rock

Live rock serves as natural biological filtration and a base for placing corals. Use approximately 1kg per 10 liters of total water volume. Build with good water flow in mind—don't pack too tightly.

Step 4: Mix Saltwater

Dissolve synthetic sea salt in RO water (purified water) and adjust to specific gravity 1.024-1.025. Add at water temperature around 25°C. Mix in buckets before adding to the tank for more stable specific gravity.

Step 5: Start Equipment

Start all equipment. Activate the protein skimmer, wavemakers, heater, and lighting in sequence, confirming each operates normally. Do not add any livestock at this stage.

Step 6: Establish the Nitrogen Cycle (3-6 Weeks)

Wait for live rock bacteria to activate and establish the ammonia → nitrite → nitrate decomposition cycle. Test water quality regularly and confirm ammonia and nitrite have reached zero. Skipping this step causes coral die-off.

Step 7: Introduce a Cleanup Crew

Add snails (Nassarius, Trochus), hermit crabs, etc. first. They serve as important algae cleaners on glass and rocks.

Step 8: Introduce Corals

Once water quality stabilizes, it's finally time to add corals. Start with hardy soft corals (Zoanthids, Green Star Polyps, etc.). Don't add many at once—add 2-3 pieces at 1-2 week intervals.

Step 9: Begin Regular Maintenance

Continue with approximately 10% weekly water changes, trace element supplementation, and lighting timer management. A stable coral tank shows minimal daily changes. If sudden changes occur, immediately check water quality.

On Bri-Choku, you can not only purchase specimens from experienced coral breeders but also consult them about tank setup. First-timers are welcome to take advantage of this resource.