Skip to main content

Methylene Blue in Aquariums

Methylene Blue is an medicine used in aquariums for fungal and bacterial infections.  It is also used for parasite infestations.

Methylene Blue is also effective in treating fishes which have been exposed to nitrite poisoning.  Nitrite is a poisonous product produce by decomposing waste in the aquarium.  It is broken down into harmless nitrate compounds. 

However, if the water is not replaced at regular intervals or if the biological filter is not working, the nitrite levels can spike.  And fish can become sick.  Such fish can be kept in a bath of methylene blue.  Methylene blue increases the level of haemoglobin the blood of fishes, increasing the ability of blood to carry oxygen. 

Methylene Blue usually comes in a liquid form or in the form of a powder.  Follow the instructions in the bottle. 

General Dosage
Bath: 12 mg per litre.  Keep the fish in the solution for 10 minutes

Dip: 50 mg per litre.  Keep the fish in the solution for 10 seconds

It is better to add the medication to a separate quarantine tank and introduce the sick fish into it.  This is because methylene blue is indiscriminate.  It also destroys the beneficial nitrifying bacteria which can result in ammonia spikes.  Methylene blue will also result in a blue stain on the aquarium. 
Methylene Blue is also toxic to plants.   Do not add methylene blue to the aquarium, if you have live plants.

If you want to add the methylene blue to the entire aquarium, consult your veterinarian.
In some situations, methylene blue may not totally the infection or the parasite infestation.  In such cases more specific medication may be required. 

Methylene Blue while Breeding
Methylene blue is also used when breeding fishes.  Fish eggs are particularly prone to fungal infection.  Keep the breeding pair in a separate tank. Add methylene blue to the water.  this protects the eggs from the fungus.

Popular posts from this blog

Plecos - An Overview

Keeping Plecos in the Aquarium

Plecos are tropical fish.  They will also grow to about a foot long.  Some individual fish have grow to about 2 feet.  This should be kept in mind before purchasing the fish.
Plecos require a large tank about 55 gallons.  They are pretty hardy fish.  It is easy to care for them.
A pH of 6.5 to 7.5 is ideal.  The temperature can be between 23 and 30 degree Celsius.

Provide plenty of hiding places such as rock overhangs, driftwood and plants for the pleco to rest during the day time. 

Plecos are nocturnal fish and they are most active at night.

Plecos are highly territorial.  They require at least 75 gallons per individual.  While they get along well with fish of other species, they become aggressive and hostile with members of their own species.  Hence, it is not advisable to have plecos together.

Having More than one Pleco
Besides, plecos have a high bioload. 

They are voracious eaters and produce copious amounts of waste.  The water in the tank can get dirty wit…

Aquarium - Benefits and Maintenance

An Aquarium can be a very beautiful and engaging addition to your home. The principle reason why people want to have an aquarium in their home is for aesthetics. Aquarium add to the beauty of the home.

The graceful movement of fish relaxes the mind. It lowers stress levels and is proven to improve health and wellness in peoples.

Patients who have been made to view aquariums have been known to recover faster.

An aquarium also teaches us about harmony. Within the closed environment of the aquarium are complex biological and chemical processes. We understand how everything in nature is related. A slice of a natural water body such as a pond or a river is brought into our homes.

Interacting with fish helps people build empathy and compassion towards animals and people. The fact that a totally helpless animal is entirely dependent on you brings a sense of responsibility and helps people develop a caring nature.

Checking water parameters of your Aquarium

Water quality is extremely important.  Fis…