2Hr Aquarist APT Estmative Index

2Hr Aquarist APT Estmative Index (EI) – Supercharged Plant Fertiliser

APT e is a high-concentration EI-style nutrient blend crafted for heavily planted and high-light aquariums. It delivers abundant NPK, magnesium, iron, and comprehensive trace elements—offering rapid growth and rich coloration in a fully simplified dosing solution.

Key Features & Benefits

EI-calibrated formula: Designed for daily dosing (2 ml per 100 L) with weekly water changes—supports maximal plant uptake.
Richer coloration: Low-nitrogen balance slows chlorophyll overproduction, enhancing reds and overall plant vibrancy.
High magnesium boost: Provides ~2× the magnesium compared to standard EI mixes, promoting healthy leaf development.
All-in-one convenience: Delivers NPK (Mg) plus B, Cu, Mn, Mo, Zn & chelated iron in a single, easy-to-dose solution.
Calibrated pump-included: Convenient dosing—1 ml per press, delivering consistent nutrient supply.

Specifications

Feature	Details
Nutrient Profile (w/v)	1.6 % N • 1.7 % P₂O₅ • 8.5 % K₂O • 1.6 % MgO • 0.18 % Fe (chelated) + B, Cu, Mn, Mo, Zn
Recommended Dose	2 ml per 100 L daily
Container	300 ml bottle with calibrated pump (1 ml per pump)
Coverage Duration	Approx. 3 months for a 150 L planted tank
Form	Water-soluble inorganic liquid

Why Choose APT e?

Engineered for high-light, densely planted Dutch-style setups where nutrient demand is highest.
Delivers rich plant pigmentation with tighter, healthier growth structure.
Provides substantial magnesium—essential for enzymatic functions and chlorophyll synthesis.
Includes comprehensive micronutrients in a single, concentrated blend.
Trusted by serious aquascapers and supported by the proven EI methodology.

Select Size (L): 1L, 500ml, 300ml, 200ml
Weight: 0.25 kg
Dimensions: 10 × 10 × 10 cm

Shipping

Delivery in 2-5 Days. Express delivery is available at checkout for an additional fee.

Returns

We accept returns within 3 days of delivery. Items must be unused and in their original packaging.

2Hr Aquarist

The story of The 2Hr Aquarist begins on the sunny island of Singapore, at the crossroads of East and West and one the world’s largest trading hubs of aquarium fish and plants. In 2015, well-known aquarist and aquascaper Dennis Wong started a youtube channel to share his techniques in growing aquatic plants and long-term maintenance of freshwater aquariums. Followers started experiencing the results that came with his approach (success with growing some of the hobby’s most difficult plants, controlling algae, attaining previously ‘impossible’ richness of colours and form) and started sharing the news with others. This led to the development of The 2Hr Aquarist, an organization dedicated to providing the tools and resources for enthusiasts across the world to achieve mastery of the freshwater planted aquarium. We have since grown to become a diverse and entrepreneurial team with over 20 years of combined experience in research, product development, international sales and distribution, marketing and communications. Most importantly, we are aquarists ourselves and enjoy the art and science of the freshwater aquarium. We are grounded by facts and empirical results. We use what we sell and practice what we write.