Proper reef tank maintenance is essential for healthy coral growth, stable water parameters, and long-term success. This guide explains the daily, weekly, and monthly tasks needed to keep a marine reef aquarium thriving.
Important: Stability is more important than perfection. Always make slow adjustments and test your water regularly.
Daily Reef Tank Maintenance
- Check aquarium temperature (ideal range 24–26°C)
- Top off evaporated water using RO/DI freshwater
- Observe fish and coral behaviour for signs of stress
- Check pumps, wavemakers and skimmer operation
- Feed fish and coral appropriately
Weekly Reef Tank Maintenance
- Perform a 10–15% water change
- Clean aquarium glass using algae scraper or magnet cleaner
- Empty and clean protein skimmer collection cup
- Test key parameters:
- Salinity
- Alkalinity (KH)
- Calcium
- Magnesium
- Nitrate
- Phosphate
- Inspect return pump and powerheads for debris buildup
Monthly Reef Tank Maintenance
- Deep clean wavemakers and return pump
- Replace or rinse mechanical filtration media (filter socks / sponges)
- Inspect lighting system and remove salt creep
- Trim macroalgae in refugium if present
- Check dosing pump calibration
- Inspect plumbing and sump for salt buildup or leaks
Every 3–6 Months
- Replace activated carbon or chemical filtration media
- Service protein skimmer completely
- Inspect heater performance and temperature accuracy
- Re-evaluate coral growth and adjust lighting intensity if needed
Maintaining Stable Water Chemistry
Reef tanks rely on stable calcium, alkalinity and magnesium levels for coral skeleton growth. Sudden parameter swings can cause coral stress, tissue loss or algae outbreaks.
- Test water before dosing supplements
- Increase parameters slowly
- Use dosing pumps for consistent supplementation
- Perform regular water changes to maintain trace elements
Controlling Algae in Reef Tanks
- Avoid overfeeding
- Maintain proper flow to eliminate dead spots
- Use clean-up crew such as snails and hermit crabs
- Control nitrate and phosphate levels
- Ensure lighting schedule is not excessive
Equipment Maintenance Tips
- Always unplug equipment before cleaning
- Use vinegar solution to remove calcium buildup
- Keep spare return pump and heater if possible
- Regular maintenance extends equipment lifespan
Recommended Maintenance Checklist
| Task | Frequency |
|---|---|
| Top off evaporation | Daily |
| Check temperature | Daily |
| Water change | Weekly |
| Test water parameters | Weekly |
| Clean pumps | Monthly |
| Replace carbon | 3–6 Months |
Disclaimer: This reef maintenance guide provides general recommendations only. Maintenance requirements vary depending on aquarium size, coral species, equipment, and stocking levels. Always monitor your system closely and adjust routines as needed.
Use our Reef Tank Calculators to determine correct flow, dosing, lighting and equipment sizing for your aquarium.