The 2Hr Aquarist APT e – EI-Style Aquarium Fertilizer

2Hr Aquarist APTe

APT e is the concentrated EI-style liquid fertiliser for high-energy planted systems; the manufacturer specifies 2 ml/100 L/day.

Best for

Heavily planted high-energy aquariums; Dutch-style layouts; experienced aquarists; strong CO2 and maintenance

How to use

Dose consistently; manufacturer frames it for EI-style/high-energy systems.

Technical information

N 2.0% nitrate nitrogen; P2O5 1.37%; K2O 8.0%; Mg 1.60%; Fe 0.16% chelated

Composition: Potassium sulphate, potassium phosphate, potassium chloride, magnesium nitrate, magnesium sulphate, DTPA iron, EDTA iron, EDDHA iron

Important

Not the default choice for a low-maintenance or unstable young aquarium; requires disciplined maintenance.

Related APT products

APT 3, APT 1, APT Pure, APT Balance

Manufacturer: The 2Hr Aquarist. Technical information verified against the official manufacturer page on 2026-09-28.