Been there done that....just do the 10g QT setup. Will save so much heartache and $$$. Most on here know this practice works, so if u follow proper QT protocol, it will be one less worry. And as we know in this hobby there can often be bigger tougher problems to figure out. So do yourself a favor....do a QT tank and you and your fish will be much happier!! On a side note I QT and as a last final step before going in DT I like to do a 2 min freshwater RO/DI dip as a final line of defense with ich.