Yes should turn UV on ASAP, it will help buy you time by killing the free swimming stage, but will not come close to eradicating them. Also type of UV sterilizer you have and at what flow makes a big difference. Definitely start researching QT, time is of the essence. Unless you can get a prescription I would not waste time on CP and just look at copper treatment. You can get a 40 breeder from Petco for cheap. Heater, air pump, power head and some PVC is all you need. Plan B is just try to manage what you have with great food and hoping for the best. I don't like plan B.