2HR Aquarist APT F/Fix

2HR Aquarist APT F/Fix

  • Fights red, green and filamentous algae
  • Free from copper
  • Biodegradable
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APT F/Fix from 2HR Aquarist is a water additive that can help eliminate algae. The formula does not contain biocides, which can accumulate in the aquarium water if used frequently. Instead, APT F/Fix supports the elimination of algae by the contained epoxy-aldehyde inhibiting weak protein compounds of algae cells. This makes it easy to remove red algae, green algae and filamentous algae from a freshwater aquarium. Due to the rapid degeneration of the active ingredient, no bio-accumulation occurs and the aquarium water is not polluted.


  • Supports the removal of algae in the aquarium
  • Spot dosing possible on healthy and vigorous plants
  • Also for wood and stones in the aquarium
  • Follow application instructions


Pause filter during application.
Spot dosing for individual areas up to 1ml per 10 l every 24 hours.
For a larger area, the limit of 1ml per 10 litres may be exceeded. Distribute a dose to the affected areas and then perform a 50% water change.

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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Lili F.
Works well
29th January 2023
2HR Aquarist - APT F/Fix - 300 ml
2HR Aquarist - APT F/Fix - 300 ml

Normally I would be opposed to using chemicals for treating algae, as algae indicates a system out of balance. (read more)