Oh wow! You checked the worms out under magnification?
LOL My kinda guy! However, I do suggest doing as many fish a day as you can; the more you pull out, the less the worms have a chance to multiply. Plus, lookit how happy the Molly is
As for a QT tank, Wallymart sells a basic 10g for around $10. Grab a cheap filter; if you get a
HOB it will provide enough surface agitation, if you buy a intank filter (like a fluval) you'll need an air pump and airstone to provide some surface agitation (its the surface agitation that provides the
O2 in the water, not the bubbles that come up from the airstone). A heater is needed as well. Thats it. No gravel, no decor unless you buy fish that need a hiding place like loaches. Then add a plastic plant or a ceramic cave (both are easy to sterilise). The less in the tank, the easier it is to sterilise after if you are using the tank for treating illness, and since the fish will only be in there for a short period of time (as compared to living thier lives out in the main tank), no need to decorate it.
Now some folks leave it up all the time with a coupla small fish in it to keep it cycled. Personally I don't. I figure, if I need to treat disease, I'm going to have to sterilise the tank after anyway; plus one needs to then house the fish in the QT if a sick fish is added. I keep mine in the closet till I need it. If I need it to QT a new fish (like I am right now). I keep some extra filter media in the main tank, and use it to instantly cycle the QT by putting it in the QT filter. I generally don't do that with a sick fish tho; most meds kill off the nitrifying bacteria and I'd have to start from scratch anyway.
And no apologies necessary
Its why we're here! Keep the questions comin.