Nate you are in a spot. You have heard from two people that have long term success. Paul as you know advocates for live foods to deliver gut bacteria for health and use of filtration down to one micron as a supplement. Jay is the master of fish care through prophylactic pre treatment and biosecurity.
I never could find success with biosecurity and prophylactic measures and killed lots of fish trying. I did have good repeatable success with mechanical filtration and UV in series. The Mechanical before the UV and return to the tank not recirculation to the sump. I set up multiple aquarium stores for my customers this way and they reduced their loss rates to about 3 percent of shipped fish.
At this point you have to decide if you will lose more fish and inverts with a breakdown or just using management. Tough choice. But the fish are showing normal activity and feeding which is in your favor. If respiration increases and fish get lethargic you are at a point where intervention might be too late. I honestly can't make that decision for you. I'm in the camp of management due to the stress on the fish an inverts from a tear down.
I recommend replacing UV bulbs every six months as that was our protocol back in the day. Pulling for your success which ever way you go.