I know his fins don't look too bad, but I have attached a photo of him taken about a week ago and you can see that his fins are not ragged; the near translucent areas in the older photos are now gone.
I know what you mean about the salt treatments, but those white spots are really worrying me. Reading the posts on this site suggests that my last fish might well have columaris and I don't want to risk Zorro getting worse
I have done a 100% water change, cleaned the gravel and tank ornaments and am currently trying the ick 12 hourly treatment of 1 teaspoon per gallon up to 3x normal salinity suggested on this forum. Zorro is showing no reduced appetite but he has the white spots on the fin bases and cheek. During transfer to a small bucket during cleaning his white spotted cheek was damaged (he's very, very lively) so I now have to worry about infection
So, the short version I guess, given that his fins are slightly more ragged and he suddenly has approximately 10 white spots on him (plus a scraped cheek), should I continue the salt treatment (to 14 teaspoons salt in a 7 gallon tank) or try something else?