Ick treatment question

[RTCfan86]

Recently, the 3 Synodontis Petricola in my 50 gallon breeder got ick. The other fish in the tank appear to be just fine (EBJD, Melanochromis Auratus, and 2 Plecos). Unfortunately, the 3 catfish died. I'm guessing maybe the medication was too strong for them. Do I need to still treat the tank, besides for a water change if the other fish don't have it? Also, if I started to change the water more often than in the past, could that have caused to ick to come about?

 

[Dare]

ich can be caused if when changing the water, the water u put in is colder then ur tanks temperature

based on what i have read, ich cannot reproduce/grow at temperatures above 85 degrees, so slowly raise the temp to 86 and if u want, add salt, 2 teaspoons per gallon

Edit : also note, oxygen levels decrease with higher temperatures, so add an airstone accordingly or better yet a powerhead

 

[Dare]

there is a good chance your other fish have it as well, it just hasn't grown as much