Brightwell ChaetoGro – Complete Growth Supplement for Chaetomorpha

Complete phosphate- and nitrate-free supplement for Chaetomorpha growth

Brightwell ChaetoGro is a complete multi-nutrient supplement specially formulated to promote vigorous and sustainable growth of Chaetomorpha in all marine aquariums, including ULNS (Ultra Low Nutrient Systems).

• ✔ Phosphate-free
• ✔ Nitrate-free
• ✔ Safe for shrimp and invertebrates
• ✔ Optimized for biological nutrient control

ChaetoGro provides 13 essential elements necessary for the health, growth and colouring of seaweed, allowing Chaeto to efficiently consume phosphates and nitrates present in the system.

🧠 Why use ChaetoGro?

In a reef refugium, Chaetomorpha acts as a natural biological filter by absorbing dissolved nutrients. To function effectively, it requires specific trace elements that are often lacking in modern, heavily skimmed systems.

ChaetoGro supports:

• Rapid and dense growth of the Chaeto
• More efficient absorption of nitrates and phosphates
• ULNS system stability
• Long-term health of macroalgae

🔬 Technical context

ChaetoGro provides elements recognized as essential to algae metabolism:

• Potassium – protein synthesis and enzyme activation
• Iron – photosynthesis
• Magnesium – a component of chlorophyll
• Molybdenum & Cobalt – nitrate reduction
• Zinc & Manganese – Enzyme Activation
• Sulfur – protein formation
• Boron – chlorophyll production

⚠️ ChaetoGro contains neither nitrogen nor phosphorus.
For optimal growth, Brightwell recommends maintaining:

• Minimum phosphate: 0.01 ppm
• Nitrate: 3 to 5 ppm

If these levels are too low, the growth of Chaeto will be limited.

📦 Available formats

• 250 ml
• 500 ml
• 2 L

🧪 Official instructions

Shake well before use.

🔹 Initial dosage (first 2 weeks)

5 ml per 20 US gallons (≈76 L)
Twice a week

500 ml treats up to approximately 7,600 L.

🔹 Advanced dosage recommended

For optimal stability:

6 drops per 20 US gallons per day

Adjust after one week according to the appearance and needs of the Chaeto.

Daily dosing is preferable to weekly dosing to avoid nutrient fluctuations.

🔄 Recommended Synergy

To optimize results:

• Maintain an adequate carbon source
• Use MicroBacter7
• Use Reef BioFuel or Katalyst

📊 Guaranteed analysis

• NPK: 0-0-1.30
• Potassium (K2O) 1.30%
• Iron 0.1%
• Magnesium 0.4%
• Calcium 0.14%
• Manganese 0.0475%
• Molybdenum 0.004%
• Cobalt 0.0004%
• Zinc 0.002%
• Sulfur 0.16%
• Boron 0.009%
• Chlorine 0.39%
• Carbon 0.005%

🧪 Sources of nutrients

Potassium sulfate, calcium chloride, magnesium sulfate, potassium iodide, iron EDTA, zinc sulfate, manganese chloride, sodium tetraborate, cobalt chloride, sodium molybdate, nickel chloride