Methylene Blue

Ingredients:
— Contains zinc-free, chloride salt of Methylene Blue in a 2.303% water solution
— Very stable in this solution, even when exposed to sunlight
— Not intended for human consumption so store the bottle away from children

Each bottle contains 4 fluid ounces (118 mL) and treats 240 gallons. Methylene blue may stain the silicone sealant in aquariums, so consider treating the fish in a catch cup or hospital tank rather than the main display tank.

Manufacturer's Directions for Use

For All Treatments:
— Methylene blue is best used in a bare aquarium or pond, since it can disrupt beneficial bacteria and plant growth
— Before using the medication, remove any chemical filtration (like activated carbon) and porous materials (like driftwood and rock)
— Once the treatment is complete, a partial or complete water change should be made and activated carbon replaced in the filter.

1) For Prevention or Treatment of Fungus on Fish Eggs:
— Add 1 teaspoon of methylene blue per 10 gallons of water to produce a 3 ppm concentration. To increase the concentration by 1 ppm, add approximately 1/3 teapsoon (1.64 ml) per 10 gallons of water.
— Only one application is needed. Treatment should continue for 3 days past the free swimming stage or for livebearers 2 days after birth.
— Make a water change as noted and replace the filter carbon at the conclusion of the treatment.

2) For Prevention or Treatment of Fungus or External Parasitic Protozoans:
— Add 1 teaspoon of methylene blue per 10 gallons of water to produce a 3 ppm concentration. Continue the treatment for 3—5 days.
— Make a water change as noted and replace the filter carbon at the conclusion of the treatment.

3) For Treatment of Nitrite or Cyanide Poisoning in Fish:
— Add 1 teaspoon of methylene blue per 10 gallons of water to produce a 3 ppm concentration. Continue the treatment for 3—5 days.
— Make a water change as noted and replace the filter carbon at the conclusion of the treatment.

4) For Use as a Dip to Treat Fungus, External Parasitic Protozoans, or Cyanide Poisoning:
— Prepare a nonmetallic container of sufficient size to contain the fish to be treated by adding water similar to the original aquarium.
— Add 5 teaspoons (24.65 ml) per 3 gallons of water to produce a 50 ppm concentration. It is not recommended that the concentration be increased beyond 50 ppm.
— Place the sick fish in this solution for no longer than 10 seconds.
— Return the fish to its original aquarium.