I picked up a fish and most of the tank had ich. I dosed ginger powder and within a couple days ich is 100 percent gone. I know some will say no but this is the 3 rd time I've beat it over the last 4 years after simply adding ginger. I use to think it was just in the food but I have a yellow eye who is strictly and algae eater. His cleared up as well which tells me you can simply add it to the water. Everything else is snake oil imo. This is the only method with proven results. At least for me.