Re: Dead fish in a clean tank. (my take on Melafix...long)

A start would be the initial risk....but here goes.
Right from the folks at the U of F....
For most fish, potassium permanganate can be administered at a
concentration of 2 mg/L as a long-term bath (four-hour minimum) in
fresh water or salt water systems. Potassium permanganate is also
reasonably safe to use in recirculating systems and has minimal impact
on biofilters when used at 2 mg/L. Treated water should retain the
purple coloration for at least four hours.

I shoot for 6 hours minimum and 8 hours max for color retention.

For a treatment rate of 2 mg/L, this formula would be:


Grams of Chemical = Gallons Treated × 0.0038 × 2 mg/LTherefore, to
treat a 250-gallon vat, the grams of potassium permanganate needed are
as depicted below:


Grams needed = (250 gal) × (0.0038) × (2 mg/L) = 1.9 gramsAn
inexpensive gram scale can be obtained by purchasing a dietary scale
at your local grocery store or pharmacy. One level teaspoon of
potassium permanganate weighs about 7.0 grams.

Or better yet make a stock solution up as such for small systems:
A stock solution is a concentrated solution of chemical from which
small amounts can be taken to treat tanks as needed. This is useful
when either multiple tanks or multiple treatments are needed. An easy
way to make up a stock solution for potassium permanganate is to
purchase a one-gallon bottle of distilled water, weigh 285 grams of
potassium permanganate, add it to the solution, and mix thoroughly.
This stock solution will deliver a dose of 1 mg/L when delivered at a
rate of one drop per gallon. Therefore, to achieve the desired
concentration of 2 mg/L, the stock solution can be delivered at a rate
of two drops per gallon. The stock solution should be stored in a
cool, dark area and be replaced annually.
When treating larger systems, it is useful to remember that 20 drops
are equal to 1 milliliter (ml), or one cubic centimeter (cc) if
measuring the liquid with a syringe. Therefore, 1 ml of stock solution
will treat ten gallons of water with a concentration of 2 mg/L.

Itys best to store mixed stock solution in a dark or opaque container
in a cool out of the light area away from any hydrocarbons just ncase
it leaks. I store my stock in white plastic gal jugs in a sealed (snap
on lid) plastic 5 gal bucket.

And as a side note to goat keepers. I had a proboem with one doe that
used to have a fungal infection on lower legs and hoofs and after
numerous trips to vet and constant daily foot baths and much $$$ and
no results, I decided to either put her down or see what PP may do. I
gave her 3 days worth of treatments which consisted of a 1 hour stand
in a PP bath......with no rinseing afterwards. Retaining a goat in
any liquid is a chore in itself. Within 1 week after initiala
treatment her legs and hoofs looked better than any treatment i paid
for did. Within 3 weeks all sores and infections were totally on the
road to being gone and she started to regrow hair..She made a full
complete recovery and is still doing fine.... Sorry about OT and goats
being treated, but PP is some good stuff if used right.....and it
works wonders on most fungal type problems. May not be the best choice
for Ich due to cost, but it still is a viable method of erradicating
ich. Potassium permanganate will kill bacterial, fungal and many
parasitic agents, but it is not viricide.

To do a demand test:
You can use this method to estimate the amount of potassium
permanganate required for effective treatment This method will.
determine the potassium permanganate demand or amount of chemical
required to react with all the organic matter in a water sample. This
procedure measures the 15-minute demand. This value is then multiplied
by 2 to give the recommended treatment rate. The 15-minute demand is
determined as follows:

Prepare a 1,000 mg/L stock solution by adding 1,000 milligrams or 1
gram of potassium permanganate to 1 liter of distilled water and mix
thoroughly.
1. Collect five 1-liter samples of the subject water.
2. Prepare a series of test treatments. Add 2, 4, 6, 8, and 10
milliliters (mL) of the stock solution (prepared in Step 1) into the
five 1-liter samples. Mix thoroughly.
3. Wait 15 minutes.
4. The test treatment that has the slightest faint pink color after 15
minutes is the correct 15-minute potassium permanganate demand. If
there is a question as to which rate has a faint pink color, choose
the lower treatment rate.
5. Multiply the 15-minute demand treatment by 2 to get the proper
treatment rate for the pond.


If in doubt go with the lowest dose rate and monitor fish closely.
Average common dose is 2ppm

Don't forget, all fish types have different levels of tolerance.




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The original frugal ponder ! Koi-ahoi mates....
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Relevant Pages

  • Re: Dead fish in a clean tank. (my take on Melafix...long)
    ... Wished I'd thought to try the PP on my goats before spending thousands and still ending up having to get the vet to amputate a few. ... Potassium permanganate is also ... Or better yet make a stock solution up as such for small systems: ... treatment her legs and hoofs looked better than any treatment i paid ...
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  • Re: Dead fish in a clean tank. (my take on Melafix...long)
    ... Potassium permanganate is also ... > Or better yet make a stock solution up as such for small systems: ... > treatment her legs and hoofs looked better than any treatment i paid ... > by 2 to give the recommended treatment rate. ...
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