Hi...2-3 days after you see the last spot disappear if you are running your tank temp at about 82-85 degrees following the usual treatment stesp for ich. SH
I'm on my 4th week of treating my 210 litre tank Spots aren't as bad as before but they are playing tag and passing it on to eachother. Its costing me a fortune in Interpet no. 6 medicine
I will treat for at least a week after spots are not seen when I eventually get to that point
Hi...it should be, however, that doesn't mean that sometimes you can have persistence and need to retreat. Texts say that many fish develop a 'resistance' to the ich organism after one infection. Good luck. SH