2HR Aquarist APT Estimative Index – Precision Dosing for Advanced Aquascapes

Take the guesswork out of nutrient dosing with this ready-to-use formula.

APT Estimative Index by 2HR Aquarist is a concentrated liquid fertilizer designed for high-tech planted aquariums. Based on Tom Barr’s renowned Estimative Index method, it delivers a complete macro and micro nutrient profile to support lush plant growth, vibrant coloration, and algae control. Ideal for tanks with strong lighting and consistent CO₂ injection.

Dosing Instructions:

• Standard: 5ml per 100L, four times a week
• Daily: 3ml per 100L
• Shake well before use

Key Benefits:

• Supports robust growth in demanding aquatic plants
• Improves leaf coloration and density
• Helps prevent nutrient deficiencies and algae outbreaks
• Compatible with APT Complete and APT Zero for tailored dosing

Specifications:

• Volume: 200ml
• Application: Planted Aquarium Fertilizer
• Country of Origin: Germany

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