Acclimatization of fishes

Acclimatization of Fishes

Acclimatization of Fishes

It is important that you acclimate your fish to the new environment before releasing them into the aquarium.  The purpose of acclimatization is simple: the water that the fish is packaged in has different temperature, pH, and salinity parameters than your aquarium. Fish are very sensitive to even minor changes in these parameters, so proper acclimation is the key to ensuring their successful relocation.  The process of acclimatization should be slow to avoid shock to the fresh stock of livestock / fish.

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Also, remember to keep your aquarium lights off for at least four hours after the specimens are introduced into the aquarium to help them further adjust to the new environment.   It is also advisable that all aquatic life be quarantined in a separate aquarium for a period of one to two weeks to reduce the possibility of introducing diseases and parasites into your aquarium and to ensure they are accepting food, eating properly, and are in optimum health before their final transition to your aquarium.

At times, due to non-availability of quarantine aquarium, this cannot be achieved, it is therefore recommended that you are able to match the water parameters (hardness, temperature etc.) and see for visible signs of deformity and / or pathogens before releasing your new stock into the aquarium.

Acclimatization of Fishes

The sealed packaged fish should be placed in your aquarium.  Turn off the aquarium lights and also dim the lights in the room where the aquarium is situated.  Never open the box in bright light – severe stress or trauma may result from sudden exposure to bright light.  Float the sealed bag in the aquarium for 10-15 minutes.  Do not open the package bag at this time.  This will allow the water in the package bag to adjust slowly to the temperature in the aquarium, while maintaining a high level of dissolved oxygen.  After floating the sealed shipping bag for 10-15 minutes, open the bag slowly without causing agitation to fish(s).

Add 100-200 ml of aquarium water to the package bag of fish.  Repeat this step of addition of aquarium water in small quantities every 3-4 minutes till the package bag of fish is full.  Now discard half the water from the package bag and again keep the package bag floating in the aquarium and proceed to add 100-200ml of water every 3-4 minutes until the bag is full. Now, using the fish net, release the fish into the aquarium and discard the package bag and its water.  Never mix the water of package bag into the aquarium, as there is always a risk of infection.

Patience is Necessary

Be patient – never try and rush the acclimatization procedure. The total time for acclimation should not take more than an hour. You should follow acclimatization procedure even if your new fish appears to be dead.  Some fish and invertebrates can appear as though they are dead when they arrive. They will usually revive when the above procedure is followed correctly.  Never place an airstone into the package bag when acclimatizing your new stock. This will increase the pH of the packaged water too quickly and expose your new stock to lethal ammonia.  Keep aquarium lights off for at least four hours after the new stock is introduced into the aquarium.

Sponges, clams, scallops, and gorgonias should never be directly exposed to air, which could be fatal to them.  In certain instances, your new tank mate will be chased and harassed by one or all of your existing tank mates.  Provide for adequate hiding spaces, this will assist the new member to adjust better and faster.

You could also use a plastic spaghetti strainer. To contain a tank bully within the aquarium for several hours until the new arrival adjusts to its surroundings, it can be used .  You could also use perforated aquarium partition to segregate aggressive species from timid ones / new tanks mates.  After the new addition adjusts to the unfamiliar environment, the divider / partition can be removed.  Please observe the behaviour of the bullying species and that of your new tank mates very carefully and re-introduce the partition. If bullying continues and remove when the environment is conducive.


Some live corals produce excess slime when transported. After the culmination of the acclimatization process, hold the coral by the rock or skeletal base. Gently shake it in the package bag before placing into your aquarium. In order to avoid any damage, never touch the “fleshy” part of a live coral.  Many species of coral will not open for several days after introduction into their new home and may look dead.  Please allow several days for the coral to adapt to the new conditions in the aquarium.

Aquarium Maintenance

Tips to maintain your aquarium

Good aquarium maintenance practices will lead to a healthy aquatic environment and thriving fish, providing years of joy for the hobbyist.  Jump to routine maintenance guide!

Expensive and time-consuming problems can be prevented by spending thirty minutes on maintenance every other week.


The biggest factor for maintenance is tank stability / Nitrogen Cycle. As long as everything is running properly and your fish are healthy, there is no need for any major change, even if the pH or hardness seems to be slightly out of range; only increases or decreases of the major aquarium water parameters will need your careful but immediate attention.

Water Changes :

A key part of aquarium maintenance is the water change, which should be performed about every two weeks. In most cases, 10-15% of the tank volume is sufficient. A good method is to replace the water extracted while vacuuming the gravel, which will eliminate uneaten foods and other residues that settle on the substrate.

It is highly recommended to check the water parameters of both the tank and replacement water. Most tap water (city water) contains either chlorine or chloramine. Chlorine will air out rather quickly (kept in an aerated bucked for twenty-four hours); chloramine (chloramine = chlorine + ammonia) will not. Using a water conditioner will neutralize the chlorine in both cases, but ammonia will still be present in the latter. It has to be broken down by the nitrifying bacteria present in the aquarium. This may take longer than your fish can tolerate.

Aquarium Maintenance

Other elements of municipal water may be phosphates, iron, and other heavy metals. To find out about your tap water chemistry, call your local water company.  Well water is usually harder than tap water, but it is chlorine/chloramine free.

You will need to thoroughly check the water parameters before investing upon an aquarium as purchasing water might be an expensive proposition for effecting periodic partial water changes.

You may also read : Acclimatization of Fishes

Aeration :

Regularly check the air-pump to ensure adequate air-flow and aeration. Periodically change the air stones which get clogged. You can chose air-stone as per the requirement of the aquarium livestock and for increasing the aesthetic sense of your aquarium.

Filtrations :

Regularly check the substrate of your filter to ensure adequate filtration and clean them regularly in aquarium water. Never use the tap water for cleaning the filter.  The choice of filter is very important as different species of fish can react differently to water movements. Fishes like Siamese Betta Fish, Angel fish, Ramerezi prefer peaceful water movement.  Oscar and Blood Red Parrot are comfortable in filtration system with heavy water movement.  Goldfishes are best suited with external filtration system as their fins are often entangled and sucked in internal filter system. Choosing the right filter often becomes a matter of life and death for fishes.

Do write to Aquasovi in case you have any specific queries, we will be more than happy to assist you in maintaining healthy and safe aquarium and its livestock.

Mechanical Filtration

Mechanical Filtration

The process of mechanical filtration is aimed at removing particulate material from the water. This matter may include uneaten food, faeces or plant or algal debris. Mechanical filtration is ordinarily achieved by passing water through materials which act as a sieve, physically trapping the particulate matter.  In easy terminology, solid waste can removed by physical hand netting of debris, or it may involve highly equipment which permits the water to flow through the filter and medium contained thereunder, which traps the physical wastes

Also, Removal of solid wastes from water through some form of medium is known as mechanical filtration. The solid wastes are first collected, and then must be physically removed from the aquarium system.  Mechanical filtration is ultimately ineffective if the solid wastes are not removed from the filter, and are allowed to decay and dissolve in the water.  Therefore, it is advisable that the Mechanical filtration works in conjugation with biological and / or Chemical Filtration to achieve desired result. 

Mechanical Filtration

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Aquasovi is first of its kind to offer home delivery of tropical and brackish water fishes in Delhi and National Capital Region. Aquarium accessories at competitive prices are available to aquarist and hobbyist throughout India. Aquasovi shall endeavour to cater to requirement of aquarium enthusiast in terms of knowledge as well as delivery of fish and accessories. We hope to serve our customers with quality fishes & proven aquarium accessories. We would appreciate comments and feedback from our customers.


New Tank Syndrome

New Tank Syndrome

Those who are purchasing a new aquarium or those who are new in this hobby, this important aspect is overlooked.  For healthy and sustainable aquatic life, precautions are necessary. It is important that we mimic natural environment.  All the living species in the aquarium on account of metabolic activity, will produce waste. Which has be “disposed” without adversely affecting the health of aquarium fish and plants.  These wastes will generally decompose in natural environment without any man made intervention. However, in aquarium since the nature cannot play a direct role, it is important that adequate accessories are in place to assist such decomposition of wastes. This is done by supplanting the aquarium with filtration and aeration. Some systems incorporate bacteria capable of converting nitrates into nitrogen gas thus assisting in disposal of wastes.

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While purchasing a new aquarium please be aware of these things. The bacterial colonies, involved in decomposition of wastes, take several weeks to form. During which time the aquarium is vulnerable to a condition commonly known as “new tank syndrome”.  This syndrome can also arise if the aquarium is stocked with too many fishes or the fishes are added too quickly.

Accumulation of toxic ammonia from decomposing wastes is the largest cause of fish mortality in new, poorly maintained, or overloaded aquariums.

In the artificial environment of the aquarium, the nitrogen cycle effectively ends with the production of nitrates. In order that the nitrate level does not build up to a harmful level regular partial water changes are required to remove the nitrates and introduce new, uncontaminated water.


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