You can treat your entire tank with interceptor but it is not without risks. I’ve done it several times. The downside to it is you will lose any and all copepods and amphipods as well as any shrimp and crabs most likely. All other inverts and fish for me have tolerated the treatment fine. I’ve had urchins, snails, worms, anemones, all corals and fish tolerate tank wide treatments. The problem with dr G’s is that it is so diluted that it’s intended to make one gallon of dip per bottle. And at $20 per bottle it would become comically expensive to use it as an in tank treatment. Interceptor isn’t EASY to get but not impossible. I’ve managed to locate it on multiple occasions from multiple sources. The large dog pills are far more effective as an in tank treatment. Ask yourself what is easier. Replacing your copepods in a month, or pulling mature acros off the rocks, attempting to kill off every shred of encrusted base, fill a whole hospital tank, and dip each colony in dr G’s once a week for 3-4 weeks, and then re-introduce them all....
Dr G’s is awesome and convenient, but as a dip for new arrivals. I couldn’t imagine using it to treat a tank wide infestation
