Aquarium Maintenance Tips
Weekly, Biweekly, and monthly maintenance is an important part of keeping a healthy aquarium.
Water Changes
Water changes are essential to a successful aquarium.
- A water change should be performed approximately every 2 weeks. Usually 10-15% is enough.
- It is essential to check the new water you introducing to the aquarium. Tap-water can contain chlorine or chloramine which must be eliminated before putting in the tank.
- Local tap water can also contain phosphates, iron and other heavy metals. Call your local water company to find out about your tap-water chemistry.
Testing
It is essential to check water chemistry on a regular basis.
The vital parameters to test in your aquarium are pH, nitrates, nitrites, and carbonate hardness and salinity for marine tanks.
- pH should be at 6.5 – 7.5 for most species.
- Nitrites should be zero at all times (except during cycling). If nitrites are detected make sure you check your ammonia also.
- Nitrates should be kept below 10 ppm in freshwater and 5 ppm in marine and reef (preferably 0 ppm).
Recommended Maintenance Routine
Daily
- Be aware of how your fish are acting, changes in behavior can indicate a potential problem.
- Check your equipment to ensure it is running properly.
Weekly
- Keep an current inventory of the livestock in your aquarium.
- Dead animals can decompose very quickly, which can easily cause an ammonia and/or nitrite spike, which then lead to high nitrate levels.
Every Other Week
- Test your water : pH, ammonia, nitrite and nitrate (salinity in salt and reef tanks).
- Vacuum the gravel and change 10-20% of the water.
- Clean the aquarium glass.
- Rinse filter cartridges with the the water you pulled from the tank.
- Replace carbon and filter floss (if present).
- Inspect all equipment and parts for proper operation.
- Wipe clean your aquarium top glass so that your lighting is not affected.

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Nitrifying Bacteria