Overview
APT E (Estimative Index) by 2Hr Aquarist is a professional-grade, all-in-one liquid fertilizer formulated for heavily planted, CO₂-rich setups. Based on Tom Barr’s EI method, it delivers balanced and abundant nutrients in every dose—N, P, K, Mg, Fe, and trace elements—to support lush growth and vibrant coloration.
Key Features
- Complete EI formula: All macronutrients (NPK, Mg) plus chelated iron and trace elements B, Cu, Mn, Mo, Zn .
- Ultra-concentrated: 2 ml per 100 L daily or 5 ml per 100 L thrice weekly; 500 ml covers ~150 L tank for ~3 months .
- Growth & color boost: Higher Mg and balanced N-P ratio promote deeper green and richer reds while controlling algae .
- Professional clarity: Designed for high-demand aquascapes like Dutch-style planted tanks .
Specifications
| Volume | 500 ml (also available in 200 ml, 1000 ml) |
|---|---|
| Dosage | 2 ml per 100 L daily or 5 ml per 100 L 3×/week |
| Nutrient mix | N 1.6–2.0%, P₂O₅ ~1.1–1.7%, K₂O ~8–8.5%, MgO ~1.2–1.6%, Fe ~0.16–0.28%, + B, Cu, Mn, Mo, Zn |
| Tank type | Heavily planted aquariums, Dutch‑style, CO₂‑injected systems |
Benefits for Your Tank
- Non-limiting nutrient supply: Ensures plants have everything they need to thrive, per EI philosophy .
- Vibrant aesthetic: Balanced nutrients maintain deep greens and vivid reds in high-demand plant species .
- Algae control: Healthy plant growth helps outcompete algae even with high nutrient dosing .
- Efficient & economical: Concentrated formula reduces packaging and dosing frequency, saving cost .
How to Use
- Shake well before use.
- Dose 2 ml per 100 L daily—or 5 ml per 100 L on Monday, Wednesday, and Friday.
- Perform weekly 50% water changes to reset nutrient levels, per EI methodology .
- Adjust dosing if plant growth or algae levels change; maintain CO₂ and lighting for optimal results.
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