2HR Aquarist APT 3/Complete

2HR Aquarist APT 3/Complete

  • Complete fertiliser for aquascapes
  • Lush plant growth
  • With macro- and micronutrients
  • Additional trace elements
  • 2 unit sizes
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APT 3/Complete is a holistic fertiliser for planted aquascapes with a small number of fish.
Consisting of a mixture of NPK, iron, magnesium and trace elements, the fertiliser ensures vital and colourful growth of aquatic plants. If an aquarium is supplied with a balanced amount of nutrients, aquatic plants can grow unhindered. In this way, algae are not given a basis for growth and they appear less frequently in an aquarium. Plants that are difficult to keep also depend on a comprehensive supply of nutrients consisting of macro- and micro-nutrients and trace elements. Only with this can they develop to their full glory. APT 3/Complete was developed to meet these requirements. 2HR Aquarist provides the fertiliser in two different packaging sizes.


Which product is the right one for your project?

Also available from the 2HR Aquarist APT fertiliser series are the APT 1/Zero for more fish and less plants and the APT/e Estimative Index for Holland-style aquariums and the Estimative Index Method.


  • Complete fertiliser for vital plant growth
  • Especially for aquascapes with fish
  • Extensive range of macro-, micronutrients and trace elements
  • Supports strong growth and colour formation of the plants


Once per day 3 ml per 100 l
4x per week 5 ml per 100 l

Both routines should be combined with a weekly water change of 30 %.
This dosing rate has been tested to work well for most tanks. However, if you have a very sparsely planted tank or a very densely planted tank, it is recommended to adjust the dosage based on plant growth observations.

5 ml APT 3 in 100 litres of water adds the following nutrients
Potassium (K) 3,8 mg/l
Nitrate (NO3) 1,8 mg/l
Phosphate(PO4) 0,7 mg/l
Magnesium (Mg) 0,5 mg/l
Iron (Fe) 0,05 mg/l

and additional quantities of Boron (B), Copper (Cu), Manganese (Mn), Molybdenum (Mo), Zinc (Zn)

Manufacturer's information

APT 3/Complete Composition

  • Potassium (K) 6,7 %
  • Magnesium (Mg) 1,2 %
  • Nitrogen (N) 0,7 %
  • Phosphorus (P): 0,51 %
  • Iron (Fe) 940 mg/l
  • Manganese (Mn) 149 mg/l
  • Boron (B) 146 mg/l
  • Zinc (Zn) 70 mg/l
  • Copper (Cu) 4 mg/l
  • Molybdenum (Mo) 0,009 mg/l

Store at room temperature. Keep out of reach of children and pets. Store away from direct sunlight. Unopened shelf life: 5 years.

2HR Aquarist

2HR Aquarist

The 2HR Aquarist is a young company with its roots in Singapore. The founders around the passionate aquascaper Dennis Wong, all aquaristic enthusiasts themselves, see aquascaping as a mixture of art and research. The development of the products, therefore, corresponds to a scientific approach in which empirical tests are used to create foundations and facts. The innovative APT fertilizer series from The 2HR Aquarist covers the most common scenarios that can arise in aquascaping and places healthy plants and balance in the aquarium in prospect.

General information

Item no.
EAN 8881300100155
Weight 0,40 kg
Shipping weight 0,50 kg

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Sandra K.
All in one fertilizer
8th May 2023
2HR Aquarist - APT 3/Complete - 1.000 ml - Refill
2HR Aquarist - APT 3/Complete - 1.000 ml - Refill

After using it for 3 weeks the plants are doing great. I even have less algae. So far I am thrilled about the product