|
Methylene Blue
I
PURPOSE AND BENEFIT
Methylene Blue is effective against superficial fungal infections of
fishes. The drug may be used as an alternative to Malachite Green for the
control of fungus when it is known that the fish to be treated are
sensitive. Methylene Blue is safe for use with fish eggs and fry for the
prevention of fungal infections. As a secondary use, it is effective
against some external protozoans, such as Ichthyophthirius (Ich),
Chilodonella and Costia.
The properties of the drug as an oxygen transporter (it converts
methemoglobin to the normal oxygen carrying component of fish blood,
hemoglobin) allow it to be used in the treatment of known cyanide and
nitrite poisoning of aquarium fishes. It has been suggested that newly
arrived marine fish placed in Methylene Blue can have their survival rate
increased as Methylene Blue aids in the reversal of nitrite and/or cyanide
poisoning.
GENERAL DIAGNOSIS OF PARASITIC DISEASES OF FISHES
The following brief summary of clinical signs often associated with the
parasitic protozoans discussed above is intended only as an aid for the
beginning aquarist. It is not to be thought of as a definitive diagnostic
key. It is also important that the aquarist consult appropriate, accurate
references for more specific information regarding disease problems of
fishes. In addition, if possible, skin and/or gill smears should be made
and examined by a qualified fish diagnostician. Microscopic examination is
recommended and is always essential for confirmation of a particular
disease. In the clinical signs indicated below, a particular description
may be followed by a specific disease causing organism in brackets. This
indicates that there is a high probability that the cause of the disease
you may observe on the fish is the organism indicated in the brackets. It
should be qualified that different clinical signs can be seen during the
disease process and that these can occur as the result of more than one
disease causing organism.
Clinical Signs
Increased respiration; loss of normal body color; presence of discrete
white spots (freshwater or marine Ich); scratching on tank bottom or on
objects; lethargic behavior; white tufts or strands on body [Fungus];
dustlike "peppered" spots on body surface, having a yellowish cast [Oodinium].
SPECIFICATIONS
Contains zinc free, chloride salt of Methylene Blue. Provided as a 2.303%
water solution.
MODE OF ACTION
The therapeutic action of Methylene Blue on bacteria and other parasites
is probably due to its binding with cytoplasmic structures within the cell
and also its interference with oxidation reduction processes.
STABILITY
Methylene Blue is stable indefinitely in the 2.303% solution. Aqueous
solutions show very little, if any, decomposition even when exposed to
sunlight.
COMPATIBILITIES
Kordon Methylene Blue is compatible with NovAqua®, Acriflavine, Chelated
Copper and PolyAqua®. Note: The presence of extensive amounts of Kordon's
AmQuel® will reduce or eliminate the presence of Methylene Blue.
CONTRAINDICATIONS
Methylene Blue is not indicated for the treatment of Oodinium, bacterial
infections, flukes (monogenetic trematodes) or for moderately-severe to
severe fungal infections. It is not indicated for use as a net
disinfectant or sterilizer.
The use of Methylene Blue is primarily for the control of fungus on
eggs, and to assist the transport of oxygen in fish poisoned by cyanide
and nitrite ion. Secondary uses are for the control of some external
protozoan parasites of fishes. Methylene Blue is an alternative for
treatment with other medications when prevailing factors preclude the use
of another medication. For additional information on Ich, click on
LIFE CYCLE OF ICH.
CAUTIONS
This product should not be used in recirculation systems that utilize
biological filtration. Methylene Blue will interfere with the normal
biological processes of nitrifying filter bacteria. Methylene Blue can
also interfere with normal plant growth.
TOXICITY
Methylene Blue has a wide safety margin and is nontoxic when used as
recommended. Fishes tolerate relatively high dosages without side effects.
SUGGESTED TREATMENT PROCEDURES
The following procedures are suggested for freshwater and marine aquariums
and ponds. Methylene Blue is removed by activated carbon filtration. It
will also be absorbed by porous materials such as rock, coral and wood.
The product is best used in bare aquariums or ponds, especially if they
are new. Methylene Blue may permanently color the silicone sealant in
aquariums. At the conclusion of all treatments, a partial or complete
water change should be made and activated carbon replaced in the filter.
Prevention or treatment of fungus on fish eggs:
(a) Remove carbon from the filter and continue to operate with mechanical
filter media.
(b) Add 1 teaspoon of 2.303% Methylene Blue per 10 gallons of water. This
produces a concentration of 3 ppm. For increased concentrations, add
approximately 1/3 teaspoon (1.64 ml) per 10 gallons for each required 1
ppm increase.
(c) Only one application is needed. Treatment should continue for 3 days
past free swimming stage or for livebearers 2 days after birth.
Prevention or treatment of fungus or external parasitic protozoans:
(a) Remove carbon filter and continue to operate with mechanical filter
media throughout the treatment period.
(b) Add 1 teaspoon of 2.303% Methylene Blue per 10 gallons of water. This
produces a concentration of 3 ppm. Continue the treatment for 3 to 5 days.
(c) Make a water change as noted and replace the filter carbon at the
conclusion of the treatment.
Note: If the fish are heavily infected with external gill and/or skin
parasites, it is advisable to modify the above procedure by adding 1
teaspoon of Acriflavine ( Kordon's 3.84% Trypaflavine solution is
recommended) per 10 gallons of water in combination with Methylene Blue.
Gill parasites such as Oodinium cause severe pathological damage to the
host, which results in respiratory distress. Acriflavine aids in reducing
this distress by acting as an oxygen transporter. Refer to the product
data sheet concerning the proper use of Acriflavine (KPD-29) in
established aquariums and ponds before using this optional procedure.
As an aid in reversal of nitrite (NO2-) or cyanide (CN-) poisoning of
marine and freshwater aquarium fishes:
(a) Remove carbon filter and continue to operate with mechanical filter
media throughout the treatment period.
(b) Add 1 teaspoon of 2.303% Methylene Blue per 10 gallons of water. This
produces a concentration of 3 ppm. Continue the treatment for 3 to 5 days.
(c) Make a water change as noted and replace the filter carbon at the
conclusion of the treatment. parasite protozoans."
For use as a dip for treatment of fungus or external parasitic
protozoans and cyanide poisoning:
(a) Prepare a nonmetallic container of sufficient size to contain the fish
to be treated by adding water similar to the original aquarium.
(b) Add 5 teaspoons (24.65 ml) per 3 gallons of water. This produces a
concentration of 50 ppm. It is not recommended that the concentration be
increased beyond 50 ppm.
(c) Place fishes to be treated in this solution for no longer than 10
seconds.
(d) Return fish to original aquarium.
©1997 Novalek, Inc.
|