Sick and injured koi. Identification of koi parasites.
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Parasite Treatment in Koi Gold fish and other pond fish  
By following the regime below you can eliminate all parasites that can not be seen with the naked eye. This treatment protocol is aimed at microscopic parasites that can only be seen with a microscope.
 
Proform C

available on my Supplies Page

Proform C is a combination of formalin and malachite green. It kills Ich, Costia, Trichodina, Chilodonella. It DOES NOT kill flukes. And used as directed it will not harm the filter. Available on my Supplies Page

Make sure that the salt level is below .1

Salt and formalin are not compatible. Nor is salt compatible with all plants.  See the extensive salt testing I did on each plant 

You may want to remove your plants if treating with this product because formalin is an active ingredient in herbicides! Plants may not die but will turn yellow if left in the pond during treatment. See note at the bottom of the page on how to treat plants if you remove them while treating the pond.
 

Day 1
Do a large water change, preferably by vacuuming off the bottom of the pond to remove as much crud as you can.  Formalin is bound out by organics so it is important to have a clean pond to start treatment with.

NOTE:  If you are 100% sure of your volume of water in your pond, you can add the full dose of Proform C while the water is at the 50% level.  Wait 2 hours and then slowly re-fill.  This can safely be done IF you are sure of your gallons.  If you are NOT 100% sure of you volume, I strongly recommend you follow the dose below in the day 2 treatment.
 

Day 2
Treat the pond with ProForm C using 10 ml per 100 gallons of water (100ml per 1,000 gallons)
Day 3
Repeat as for day 2 
Day 4
Repeat as for day 2
Day 5 - Now you have 2 options on what to do/use next

Supaverm or Praziquantel (Prazi)
Supaverm

Is for koi only.  It kills goldfish.  No one knows why but it  does! Cheaper than Prazi. Harder to obtain.  No water changes needed after using. Does not hurt filter.

Prazi

More expensive.  Also kills intestinal parasites (yes fish do get intestinal parasites)  Used for dogs, cats and even humans as a wormer. Hard to dissolve but it does finally dissolve after about 24 hours.  No water changes  needed after using. Does not hurt filter
 

 Day 5 - Directions for Prazi

If you are using Prazi instead of Supaverm  mix the amount of Prazi needed with the full dose of Proform C.  The Proform C helps dissolve the Prazi a bit better.   I put the Proform C in a plastic jar and then add the right dose of Prazi. Tighten lid and then shake  the dickens out of it. Then add to the pond.  You will see white "specks" but they will dissolve over the next 24 hour. Keep in mind that this is done on day 5 which is the last day of treatment with the Prazi.
 

OR - (do one or the other but not both) 
 
Day 5 - directions for Supaverm

Add salt to .1  This is one pound of salt per 100 gallons

Keep adding salt every 12 hours until you get the salt to .4 (4 pounds of salt per 100 gallons)

Once you have the salt at .4,  add the Supaverm. The dosage rate is 1 ml per 100 gallons.  Do not use more than this dose!   Be sure to shake the bottle extremely well because the 2 components in Supaverm tend to separate from one another so it is very important to shake the bottle very well.

This one time treatment should take care of flukes.

NOTE:  IF you did not add salt, then you will need to do a second treatment in 5 days
 

Many choose to remove pond plants prior to treatment.  If you do not leave the plants in the pond they will have to be treated for parasites also. I personally remove the plants because of the Formalin in the Proform C. Formalin is used in many weed killers and I have found that quite a few plants will turn yellow if left in the pond during treatment.

Dissolve 1 tablespoons of Potassium Permanganate (PP) for every 4 gallons of water. Make sure the PP is thoroughly dissolved. add a pump and air stone to the container to keep the PP solution circulating around the plants. Treat for 3 hours and then rinse with a garden hose to remove residue.

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