I'm sure you have read this, but just in case.Thanks the thing that annoys me the most it doesn't say on the bottle or on the online instructions how long to treat for... all it says is to repeat after 3 days so I'm stuffed if I know how long I'm meant to be medicating for...
Should I do a water change during the treatment?
taken fromWater temperature has a tremendous influence on how fast the life cycle for "Ich" ( Figure 1 ) is completed. At warm temperatures (75-79°F), the life cycle is completed in about 48 hours, which means that chemical treatments should be applied every other day. At cooler temperatures the life cycle is prolonged and treatments should be spaced further apart. For example, at a water temperature of 60°F, treatments should be spaced 4 or 5 days apart. In warm water, a minimum of three treatments applied 2 to 3 days apart is required. In cooler water, a minimum of five treatments should be applied 3 to 5 days apart. Treatments should never be discontinued until all mortality from "Ich" has stopped. Fish should be closely watched during recovery; the weakened fish may be susceptible to a secondary bacterial infection. The choice of chemical used to treat "Ich" will be based upon water quality conditions, species of fish to be treated, and the type of system fish are housed in. In general, copper sulfate, formalin, and potassium permanganate are all effective against "Ich" when applied at the correct concentration in a repetitive manner as described above.
and i need to correct my post. ick in not, always, in our tanks. it is, however, considered endemic, within the trade. so can be considered to be in/on, most, new bought fish. stress is still a major cause of an, imported, infection. getting hold, in a healthy tank.