Here is the method I use
First do a 50% water change. When refiling the tank I raise the temps of the tank water to 90 or 92 degrees. I have heaters that are pre set to 92 degrees that I use for this problem. I heat the tank with the new water then place my pre set heaters in the tank. I add 1 teaspoon of salt per gallon of water. Then I add Quick Cure ( malachite Green with formalin ) about a hour or 2 after the water change and salt treatment at 1.5 to double the recommended dosage. The next day I do a 1/3 to 40% water change. I add back the salt and treat the tank with another dose of Quick Cure at the recommended dosage. The third day I do no water but dose the tank with another recommended dosage of quick cure. I leave the tank alone for 48 hours then do a 50% water change. Make sure you filters are clean a day or so before you treat the tank. if water starts to foul do a 50% water change wait a day then retreat the tank. This kills ich 100% in 2 to 4 days. It does not retard the ich it tottaly eradicates it from the tank
If this does not work I do the same thing with the salt and temps but this time I do a 70% water change and use Clout, be sure to follow the directions for the recommended dosage of clout. Add the Clout about a hour or 2 after the water change.
First do a 50% water change. When refiling the tank I raise the temps of the tank water to 90 or 92 degrees. I have heaters that are pre set to 92 degrees that I use for this problem. I heat the tank with the new water then place my pre set heaters in the tank. I add 1 teaspoon of salt per gallon of water. Then I add Quick Cure ( malachite Green with formalin ) about a hour or 2 after the water change and salt treatment at 1.5 to double the recommended dosage. The next day I do a 1/3 to 40% water change. I add back the salt and treat the tank with another dose of Quick Cure at the recommended dosage. The third day I do no water but dose the tank with another recommended dosage of quick cure. I leave the tank alone for 48 hours then do a 50% water change. Make sure you filters are clean a day or so before you treat the tank. if water starts to foul do a 50% water change wait a day then retreat the tank. This kills ich 100% in 2 to 4 days. It does not retard the ich it tottaly eradicates it from the tank
If this does not work I do the same thing with the salt and temps but this time I do a 70% water change and use Clout, be sure to follow the directions for the recommended dosage of clout. Add the Clout about a hour or 2 after the water change.