2HR Aquarist APT 1/Zero

2HR Aquarist APT 1/Zero

  • Complete fertiliser for aquariums
  • For high fish population
  • Nitrate and phosphate free
  • For beautiful plant growth
  • 2 unit sizes
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APT 1/Zero from 2HR Aquarist is a complete fertiliser for aquariums with a high fish population. The fertiliser is precisely designed in its composition for a large number of fish and a few aquatic plants.
With a large fish population in an aquarium, a larger amount of nitrates and phosphates are automatically added to the water. The high nutrient levels come from fish food remains and fish faeces. For the start of a new aquarium with Soil, the addition of APT 1/Zero in the first three months can also be a benefit. This is because, especially in the first import phase, sufficient nitrate is released into the water by a used Soil.
By using this phosphate and nitrate-free fertiliser, there is no oversupply of these nutrients in aquariums with a lot of fish or freshly started with soil. The main components of the fertiliser are potassium, iron and magnesium together with an optimally balanced mineral composition. In this way, the fertiliser ensures beautiful growth and a strong colour formation of the aquatic plants. When using APT 1/Zero, no additional addition of fertiliser is necessary, as it is a complete fertiliser. 2HR Aquarist offers the fertiliser in two different packaging sizes.


Which APT product is the right one for your project?

Also available from the 2HR Aquarist APT fertiliser series are the APT/3 Complete for tanks with more plants than fish and the APT/e Estimative Index for Holland-style aquariums and the Estimative Index Method.


  • Complete fertiliser for vital plant growth
  • Specially for increased fish stock
  • Without addition of nitrate and phosphate
  • Also suitable for the first 3 months when starting a pool
  • 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

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

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

Manufacturer's information

APT 1/Zero Composition

  • Potassium (K) 7 %
  • Magnesium (Mg) 1,2 %
  • 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.

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