2Hr Aquarist APT Estimative Index (200 ml)

Overview

2Hr Aquarist APT Estimative Index (200 ml) is a concentrated all-in-one liquid fertilizer formulated according to the Estimative Index method popularized by Tom Barr. Ideal for heavily planted and Dutch-style aquariums, it delivers a complete nutrition package to support vigorous plant growth and vibrant coloration.

Key Features

• Comprehensive nutrient blend: Balanced NPK (Mg) with complete trace elements—supports fast growth and vivid colors
• Calibrated for richer hues: High magnesium and controlled nitrate formula enhance green and red tones
• Convenient dosing: 2 ml per 100 L daily (or 5 ml per 100 L, three times weekly); pump not included
• 200 ml bottle: Treats ~10,000 L (2,640 gal) on daily dosing or ~4,000 L (1,050 gal) on thrice-weekly schedule
• Shrimp-safe & plant-focused: Shares nutrients without overloading water column; prevents algae by avoiding nutrient excess

Nutrient Profile (per label)

• Nitrogen (N): ~1.6 %
• Phosphorus (P₂O₅): ~1.7 %
• Potassium (K₂O): ~8.5 %
• Magnesium (MgO): ~1.6 %
• Iron (Fe): ~0.18 %
• Includes B, Cu, Mn, Mo, Zn trace elements

Why Choose APT Estimative Index?

• Ensures no macronutrient deficiencies with EI-based dosing
• Enhanced magnesium promotes lush, dark greens and healthy growth
• Tailored dosing enables richer colors with minimal algae risk
• Simple, comprehensive fertilization—eliminates multi-step dosing

Usage Instructions

1. Shake bottle before use to ensure even mixture
2. For daily dosing: Add 2 ml per 100 L of aquarium water
3. Or for thrice-weekly dosing: Add 5 ml per 100 L on Mon, Wed, Fri
4. Always perform a 50 % water change weekly as part of EI maintenance
5. Monitor plant health and adjust dosing as needed