How hardy are RTC to ich? We just recently got our little guy a few weeks ago, and hes still only like 3.5 inches long. We bought an electric blue cichlid from the petstore and then guess what? We started seeing the white spots on some of the other fish. So we are thinking that it came from him. The redtail doesnt seem to have it just yet. He is small enough that we can isolate him till we fix the problem. Water changes and ich treatment. We already lost two 7 inch clown loaches because of this... not tooooo happy at all... Really want the catfish to make it and not perish like his other two tank mates...