2Hr Aquarist APT e is a professional liquid fertilizer for planted aquariums, designed for aquascape systems with quality lighting, CO₂ and intensive growth. The formula provides a full spectrum of macro- and microelements necessary for healthy plants, rich colors and a stable biological balance.
APT e is developed according to the principles of Estimative Index (EI), providing sufficient nutrients for maximum growth and algae control.
The EI approach pioneered by Tom Barr is designed to provide a unlimited / unconstrained amount of nutrients to plants based on a professionally Estimated Index of their needs. APTe provides a calibrated version for richer coloration and algae control.
What is APT e and who is it intended for?
APT e is a complex liquid fertilizer for:
✔ heavily planted aquariums
✔ aquascaping compositions
✔ Hi-Tech systems with CO₂
✔ Dutch style and Nature aquariums
✔ experienced aquarists
The formula supplies nitrogen, phosphorus, potassium, magnesium, iron and trace elements for optimal growth.
Key Benefits
Complete nutrient profile
- Macronutrients (NPK)
- Magnesium for strong growth
- Iron and micronutrients for rich colors
Intensive growth and colors
APT e uses a nitrate-limited approach for brighter colors and compact plant form.
Designed for Hi-Tech aquariums
Optimal for high lighting and CO₂.
Algae control
Balanced nutrition supports a stable ecosystem.
Easy dosing
Standard dosage: 2 ml per 100 liters daily.
Composition and nutrients
APT e contains:
Macroelements
- Nitrogen (N)
- Phosphorus (P)
- Potassium (K)
- Magnesium (Mg)
Traceelements
- Iron (Fe)
- Boron (B)
- Manganese (Mn)
- Zinc (Zn)
- Copper (Cu)
- Molybdenum (Mo)
All elements are completely water-soluble.
APT e available sizes
APT e 300 ml
✔ ideal for small and medium-sized aquariums
✔ economical starter option
APT e 500 ml
✔ balanced choice for regular use
✔ suitable for medium-sized aquascapes
APT e 1 liter
✔ best price per ml
✔ ideal for large or multiple aquariums
Comparison table
Size Suitable for Economy Recommendation
300 ml to ~150 l ⭐⭐⭐ small aquariums
500 ml 150–300 l ⭐⭐⭐⭐ standard use
1 L 300+ l ⭐⭐⭐⭐⭐ professional systems
How to dose correctly
Standard dose:
➡ 2 ml per 100 l daily
Example:
50 l → 1 ml daily
100 l → 2 ml daily
200 l → 4 ml daily
For heavily stocked aquariums, the dose can be adapted.
How to choose the right fertilizer for your aquarium?
Choose APT e if:
✔ the lighting is strong
✔ the plants grow quickly
✔ you are looking for intense colors
✔ you have experience in balancing nutrients
✖ the aquarium is low-tech
✖ you have few plants
✖ you avoid CO₂ systems
Benefits for plants and aquascape
- faster growth
- saturated green and red tones
- healthier leaves
- reduced deficiencies
- stable plant balance
- professional aquascape result
Problem and Solution with APT e
| Problem | Solution with APT e |
|---|
| slow growth | provides essential macro nutrients |
| pale leaves | supplies iron and trace elements |
| holes in leaves | compensates potassium and magnesium deficiencies |
| unstable growth | stabilizes nutrient balance |
Instructions for use
- Shake the bottle before use.
- Dose daily according to the volume.
- Provide CO₂ and good light for optimal results.
- Monitor the plants and adjust the dosage if necessary.
- Store in a dark and cool place.
Frequently Asked Questions
Is APT e suitable for beginners?
It is more suitable for experienced aquarists and Hi-Tech systems.
Can it be used without CO₂?
Yes, but maximum results are achieved with CO₂.
Will it cause algae?
No, when used correctly and there is a balance between light and CO₂.
How long does one bottle last?
300 ml can last about 3 months in a 150 l aquarium.
Can I combine with other fertilizers?
For specific needs (e.g. adding trace elements or iron).
Is it suitable for red plants?
Yes - supports saturated colors.
Local Availability
✔ Available in Bulgaria
✔ Fast delivery from Discus Store to 27 countries
✔ Suitable for professional aquascape projects
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