We just added a 4 line Pictus to our tank which already has 1 Oscar. We quarentined the Pictus for almost 2 weeks with no sign of illness or disease. Two days after putting him in the larger tank (75G) he is scraping and showing signs of Ich. We have salted the tank and have raised the temperature. Should we salt the tank daily? Or do you just salt it once? I think we have the temp up to approx. 85 degrees. The Oscar is showing no signs of infestation. The last Pictus we had died of Ich only days after getting him as we didn't know how to treat for it then. We don't want to lose this one too.