here is what the net says, I have read, somewhere, that salt works well
http://www.ehow.com/how_5891304_treat-ich-ponds.html
you can treat your pond with salt and it will cure ich
buy a box of ice cream salt at the grocery store, it weighs 4 lbs
next you need to calculate the size of your pond (how many gallons of water) then add about 1 lb of salt for every 200 gal
of water, wait 3 days, change about half of the water and treat it again, that should do the trick
if you could catch the ones with the ich you could treat each one in a bucket, just fill 2 buckets with pond water, add a large handful of salt to one of the buckets, add the fish and then net him out as soon as he "faints" and put him in the
other bucket with the fresh water
good luck
Source(s):
goldfish breeder 35 yrs
pondkeeper 30 yrs
1. Perform a 25% water change before treatment begins for
ich.
2. Remove activated carbon from aquarium filter or pond filter.
3. Increase aeration during
ich treatment as fish medication lowers oxygen levels in your aquarium or pond.
4. Add 1 teaspoon or 5 ml of Malachite Green for every 50 gallons of water.
5. Observe koi fish for any signs of distress and if koi fish show any signs of stress, such as gasping at the surface perform immediate 25% water change and add activated carbon back to filter to remove
ich treatment medication.
6. If no signs of stress are present, treat koi fish for 10 days and do a 25% water change in between treatments.
When
treating ich fish disease be sure to treat for the full recommended treatment as suggested by the
ich treatment medication that you are using. Ich or commonly known as
white spot disease can only be killed during the free swimming stage. Once the eggs hatch is when the fish medication goes to work to
get rid of ich. Malachite green is an effective treatment medication against ich. Once you know
how to treat ich fish disease you should have any problem treating against it. Knowledge is the key to fish care when it comes to common fish diseases and
parasites.
