Maintaining stable water chemistry is one of the most important aspects of successful reef keeping. As corals grow, they continuously consume calcium, alkalinity, magnesium, and a wide range of trace elements from the water. Without regular replenishment, these essential elements can become depleted, leading to slower growth, reduced colouration, and long-term instability.
Reef Zlements Complete is designed to simplify reef supplementation by providing a balanced dosing solution that replenishes both major and trace elements consumed by corals. Whether you’re upgrading from manual supplementation or setting up your first automated dosing system, Reef Zlements Complete offers a convenient way to maintain consistent reef chemistry.
In this guide, we’ll explain how Reef Zlements Complete works, how to set it up correctly, and how to establish a dosing routine that supports healthy coral growth and long-term reef success.
What Is Reef Zlements Complete?
Reef Zlements Complete is a comprehensive dosing system designed to replace the elements consumed by corals and other calcifying organisms.
The system provides:
- Calcium
- Alkalinity
- Magnesium
- Essential trace elements
in a balanced format that helps maintain stable water chemistry.
Unlike traditional supplementation methods that require multiple separate products, Reef Zlements Complete simplifies dosing by combining essential elements into a streamlined system.
Why Stable Dosing Matters
Corals thrive in stable environments.
While occasional fluctuations are inevitable, frequent swings in:
- Alkalinity
- Calcium
- Magnesium
- Trace elements
can stress corals and reduce growth.
Consistent dosing helps maintain:
- Stable parameters
- Improved coral colouration
- Better growth rates
- Enhanced polyp extension
- Long-term reef stability
For many reef keepers, automated dosing provides the most reliable way to achieve this consistency.
Before You Begin
Before setting up Reef Zlements Complete, it’s important to understand your aquarium’s current chemistry.
Test the following parameters:
Alkalinity
Target:
7–9 dKH
Calcium
Target:
400–450 ppm
Magnesium
Target:
1250–1400 ppm
Salinity
Target:
35 ppt (1.026 specific gravity)
pH
Target:
8.1–8.4
Starting with stable baseline values makes it much easier to establish an effective dosing schedule.
Determine Your Aquarium’s Consumption
Every reef aquarium consumes elements at a different rate.
Consumption depends on:
- Coral species
- Coral density
- Growth rates
- Coralline algae growth
- Aquarium volume
Step 1
Test calcium and alkalinity.
Step 2
Wait 24 hours without dosing.
Step 3
Test again.
The difference represents your aquarium’s daily consumption.
For example:
- Calcium drops from 430 ppm to 425 ppm
- Alkalinity drops from 8.5 dKH to 8.0 dKH
This indicates ongoing consumption that Reef Zlements Complete will need to replace.
Choosing Manual or Automated Dosing
Manual Dosing
Suitable for:
- Smaller reef aquariums
- Lower-demand systems
- Beginner reef keepers
Advantages:
- Simple setup
- Low equipment costs
Disadvantages:
- Requires daily attention
- Greater potential for inconsistency
Automated Dosing
Recommended for:
- SPS-dominated reefs
- Medium to large aquariums
- High-growth systems
Advantages:
- Consistent delivery
- Improved stability
- Reduced maintenance
Most experienced reef keepers eventually transition to automated dosing systems.
Setting Up an Automatic Dosing Pump
If using Reef Zlements Complete with a dosing pump:
Position the Containers
Place dosing containers:
- Below or beside the aquarium
- Away from direct sunlight
- In a stable environment
Install Dosing Tubing
Ensure:
- Tubing is secure
- No kinks are present
- Dosing lines cannot siphon accidentally
Calibrate the Pump
Calibration is essential.
Even high-quality dosing pumps should be calibrated according to the manufacturer’s instructions before use.
This ensures accurate daily dosing.
Establishing Your Initial Dose
Reef Zlements Complete provides recommended starting dosages based on aquarium volume.
Begin conservatively.
Why Start Slowly?
Coral demand varies between aquariums.
Starting with a moderate dose allows you to:
- Monitor response
- Avoid overdosing
- Fine-tune consumption rates
Small adjustments are always safer than large corrections.
Splitting Daily Doses
Rather than adding the full daily dose at once, divide it throughout the day.
For example:
Daily Total
20 ml
Dosing Schedule
- 5 ml at 06:00
- 5 ml at 12:00
- 5 ml at 18:00
- 5 ml at 00:00
This creates greater stability and reduces parameter swings.
Monitoring During the First Month
The first few weeks are critical.
Test regularly:
Week 1
- Alkalinity every 2–3 days
- Calcium weekly
Week 2–4
- Alkalinity weekly
- Calcium weekly
- Magnesium every 1–2 weeks
Watch for trends rather than individual readings.
Adjusting Your Dose
If alkalinity continues to fall:
- Increase dosing slightly
If alkalinity rises:
- Reduce dosing slightly
Make adjustments gradually.
A common recommendation is:
- Change dosing by 5–10%
- Wait several days
- Re-test
Avoid large corrections.
Understanding Trace Element Supplementation
One of the advantages of Reef Zlements Complete is its inclusion of trace elements.
These may include elements such as:
- Iodine
- Potassium
- Iron
- Manganese
- Strontium
These support:
- Coral colouration
- Photosynthesis
- Growth
- Metabolic processes
Because trace elements are dosed automatically alongside major elements, supplementation becomes simpler and more consistent.
Why ICP Testing Is Still Valuable
Even with a balanced dosing system, every reef aquarium is unique.
ICP testing allows you to:
- Verify element levels
- Identify deficiencies
- Detect excesses
- Refine your dosing strategy
Many advanced reef keepers use ICP testing every:
- 6–8 weeks for SPS systems
- 2–3 months for mixed reefs
This ensures supplementation remains aligned with actual consumption.
Signs Your Dosing Is Correct
A successful Reef Zlements Complete routine often results in:
Stable Alkalinity
Daily readings remain consistent.
Improved Coral Growth
Growth tips become more visible.
Better Colouration
Corals appear richer and more vibrant.
Enhanced Polyp Extension
Corals remain open and active.
Consistent ICP Results
Element levels remain within recommended ranges.
Common Mistakes to Avoid
Dosing Without Testing
Never assume your aquarium’s consumption rate.
Always use test results to guide adjustments.
Chasing Numbers
Focus on stability rather than perfection.
Minor fluctuations are normal.
Overcorrecting
Large dosing changes often create unnecessary instability.
Ignoring Pump Maintenance
Dosing pumps should be:
- Calibrated regularly
- Inspected for blockages
- Checked for wear
Forgetting Coral Growth Changes Consumption
As corals grow, demand increases.
Review dosing requirements periodically.
How Often Should You Recalibrate Dosing Pumps?
Most manufacturers recommend checking calibration every:
- 2–3 months
You should also recalibrate:
- After tubing replacement
- Following maintenance
- If results seem inconsistent
Accurate dosing relies on accurate calibration.
Reef Zlements Complete for Different Reef Types
Soft Coral Reefs
Typically lower consumption.
May require smaller daily doses.
Mixed Reefs
Moderate demand.
Often ideal candidates for Reef Zlements Complete.
SPS-Dominated Reefs
High consumption.
Benefit most from:
- Automated dosing
- Frequent testing
- ICP monitoring
Example Beginner Dosing Routine
Daily
- Automated Reef Zlements Complete dosing
Weekly
- Test alkalinity
- Test calcium
Monthly
- Test magnesium
- Inspect dosing equipment
Every 2–3 Months
- ICP test
- Review dosing strategy
This routine provides a strong foundation for long-term reef success.
Final Thoughts
Reef Zlements Complete offers a convenient and effective way to maintain the essential elements that corals need to thrive. By replacing calcium, alkalinity, magnesium, and trace elements through a balanced dosing system, reef keepers can simplify supplementation while improving consistency and stability.
The key to success is understanding your aquarium’s consumption, making gradual adjustments, and regularly monitoring water chemistry. Combined with routine testing and occasional ICP analysis, Reef Zlements Complete can help support healthy coral growth, vibrant colours, and long-term reef stability.
At Charterhouse Aquatics, we stock the complete Reef Zlements range, dosing pumps, ICP testing kits, water testing equipment, and reef aquarium essentials to help you build and maintain a thriving reef aquarium.
