The use of anti-stress compounds and calming agents is essential to minimize stress, facilitate handling, and reduce the risk of injury to the fish. Anxiolytics work synergistically in fish farming in practices such as the extrusion of eggs, biometrics, and transportation, decreasing the hypermotility and minimizing the intensity of stress imposed. It also reduces the occurrence of physical damage, thus protecting the vital physiological functions of cultured animals.

Additionally, it is used for the transport and processing of live fish for aquaculture and the aquarium trade to reduce stress and minimize fish mortality or injury. Less active and calmed fishes experience a decreased metabolic rate, so can be transported at higher densities to markets or for stocking purposes. Aquaculture operations often calm fish prior to harvest, a practice referred to as “rested harvest,” which minimizes stress-induced lactic acid buildup and consequently improves the color, appearance, texture, and consistency of the food product.

A number of factors are considered for choosing reliable fish calming agents such as its efficacy, cost, availability, and ease of use; as well as toxicity and adverse effects to fish, humans, and the environment. Many experiments have identified eugenol as a good alternative in fish production because they possess many of the cited characteristics and low accumulation in tissues. Moreover, harmless to the consumers and environment friendly.


Aquaknock’s is a unique micro emulsified formulation of phytoactive ingredients. It is designed for sedating fish as well as minimizing physiological stress, thus supporting its use in the management of fish.

Its eugenol content and other essential oils interact with GABA receptors in the nervous system of fish resulting in loss of sensation, responsiveness, and loss of voluntary neuro-motor control.


The effects of anti-stress agents vary with fish species, weight, and length, the number of specimens in the same bath preparation, and water quality parameters viz. temperature, pH, salinity, dissolved O2, and hardness. It can affect the metabolic rate, the clearance rate of the active compounds, acid-base balance, and ion regulation.

  • Reduces stress
  • Increases survivability
  • Easy handling of fishes during vaccination and drug administrations
  • Reduces transportation stress
  • Easy harvesting, restraining, and handling of fishes
  • 100 % organic and environment friendly
  • No impact on the dissolved oxygen level
  • Low effective doses
  • Easy applications
  • Broad-spectrum of activity covering both marine and freshwater species
  • 2.5 liter in 10,000 liters of water OR as recommended by aquaculture specialist