Now for the treatment ......
For a 3% solution of Magnesium sulphate, add 1 level tablespoon (15 grams) magnesium sulphate to 500 milliliters of distilled water. Stir, and it's good to go.
Use an eye dropper or pipette to add to pellet food (or any other food that will readily absorb it), and stop dripping water once the pellets become saturated. Use only enough water to saturate the food, with no excess water, so that the water soluble vitamins in the food remain intact. Feed twice a day, for 3-5 days. (I went with 5 days)
In extreme cases, the oral solution could be administered to a fish via a pipette.Just make sure to use a flexible tip so as not to damage the fishes esophagus when squirting the solution down the fishes throat. Only a small amount is required, but repeat daily until the fish is accepting pre-soaked pellets, and continue treatment for 5 days.
My own experience with this treatment ........ so far it's proven to be a life saver, where all other previous 'textbook' methods of treatment for internal parasites have failed, including several days of treating with 500mg Metro per 10 gallons, while feeding Metro soaked food at the same time. (fish was chewing & spitting, but was eating some food twice a day)
In less than 48 hrs of the 3% Magnesium sulphate treatment, for the first time in 30 days the fish was no longer shedding the mucous lining of his intestine. (white/clear feces) After 5 days of feeding the 3% solution via pellets, the fish had made a complete recovery & was back eating like gang busters.