Overview2Hr 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 FeaturesComprehensive nutrient blend: Balanced NPK (Mg) with complete trace elements—supports fast growth and vivid colorsCalibrated for richer hues: High magnesium and controlled nitrate formula enhance green and red tonesConvenient dosing: 2 ml per 100 L daily (or 5 ml per 100 L, three times weekly); pump not included200 ml bottle: Treats ~10,000 L (2,640 gal) on daily dosing or ~4,000 L (1,050 gal) on thrice-weekly scheduleShrimp-safe & plant-focused: Shares nutrients without overloading water column; prevents algae by avoiding nutrient excessNutrient 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 elementsWhy Choose APT Estimative Index?Ensures no macronutrient deficiencies with EI-based dosingEnhanced magnesium promotes lush, dark greens and healthy growthTailored dosing enables richer colors with minimal algae riskSimple, comprehensive fertilization—eliminates multi-step dosingUsage InstructionsShake bottle before use to ensure even mixtureFor daily dosing: Add 2 ml per 100 L of aquarium waterOr for thrice-weekly dosing: Add 5 ml per 100 L on Mon, Wed, FriAlways perform a 50 % water change weekly as part of EI maintenanceMonitor plant health and adjust dosing as needed
