So I haven't ever quarantined my fish, then again I only have 2 in a fairly new 30gal. Would it be a good idea to do it even though I dont have a lot? Would keeping them in the tank for a week suffice just to make sure they dont have ich? If so here is my idea for a QT. I would be a small 5g tank, maybe 10 half full. For filtration I would use a simple DIY Sponge filter that has been in the sump of my main. I would use water from the main to put in the QT and maybe a few pieces of 2.5-3" pvc for them to hide. It would be BB with no rock, there would also be no light. I would have a heater though. Does that sound like a good setup for just basic small fish?