Carbon
You can keep your bio-max in the tank, if you want. That way, it will be subjected to the treatment. Now, I know that sounds goofy. And I am a goofy kind of guy. But, maybe it is not Ich. It could be something else. And some of it might be on the bio-max. Put the biomax in a bag, and put it somewhere near a good water flow inside the tank. This is much easier than keeping it in a bucket, and then running an airstone to the bucket and all that.
I know you probably don't want to hear a Pike story right now. I just can't hlep but tell my story to anyone who would listen. I bought an Orange Pike while it was very small. This was my last Pike, after having had a few. I had to feed it live food, which is what the dealer was feeding it. But, after much work, I finally got it to taking pellets, sticks, etc. I stopped feeding live foods altogether and just stuck with Jumbomin, Sinking Carnivore, and Dorored. It was living in a tank with a Synodontis and a Buttikoferi. As it grew, it started to lose its orange coloration, except in the fins. Which is normal for them. The Buttikoferi also started to lose its brightness, which is normal. Due to financial reason, I had to move to a smaller place. I had to get rid of the big tanks. I took the fishes back to the dealer, along with my compressiceps and leaf fishes. A few weeks later, I came back and saw the Pike in a huge tank. It had gotten bigger, but the mouth looked like minced fish. They've been feeding it live foods and it probably caught something from the sickly feeder fishes. It was obviously sick. They put the Buttikoferi in a tank with a mean Oscar and it was badly beat up. That made me sick to my stomach. I ran out of there. So, I have a soft spot for Pikes. If my finances improve and the situation makes it so, I would get another Orange Pike.
I wish you luck with yours. In my humble opinion, the problem is trying to hit all of the possibilities with one treatment. A course of treatment can take a lot of time. And if it is not the right one for the disease, then you have wasted that much time and the fish gets weaker. Basically, you have to go for something that is wide-spectrum and hope for the best. This is just an opinion, but if I suspect bacterial or fungal, I would go with Kanacyn. I would follow the course of treatment. If you suspect parasites, then pick one that would cover a lot of the possibilities. Paragon, if they still make it, was always a good choice for me. Right now, I have one of those tank buddies, parasite clear, I think in the cabinet. Tank buddies might not be a bad choice. There's still a good chance that it's ich. Velvet sort of looks like ich and makes the fish inactive. Look for something that will treat both diseases. I would not wait a couple of weeks though. That amount of time and the fish might succumb to the disease. Just run the new carbon overnight. 25% water change before the carbon and 25% water change after. Quick Cure has a strong smell. You'll know if its still there.
I would not mix medications though. Please keep us up to date on the situation.