a little something I picked up from PaulB....I use the Omega 3 fish oil capsules from Wal-Mart, just pierce the capsule and squeeze out the oil....I mix the oil with flakes and/or pellets and feed to my fish,the Omega 3 is great for helping the fish to keep a strong immune system.....it's good for us too
my PBT did go through a bout of ich and I blame that on not QTing the clownfish that I added later, the clownfish showed signs of ich the day after adding it to my tank, the PBT had never had any sign of ich prior to that, all I did was feed the tank with the Omega 3 mixed in the food 3 or 4 times a week while they showed signs of ich, both fish fought it off naturally....
now I feed the Omega 3 couple times a month along with frozen mysis and frozen brine and the algae sheets for the grazers 3 or 4 times a week,plus I have an auto feeder connected to my tank that gives them a small treat 4 times a day....
I don't QT anymore,and it bit my butt, but all's well now.....I don't recommend not QTing but I always had more problems with tangs when I did QT them, my QT tank was a 20g and not really big enough for a tang and I believe it caused more stress to an already stressed out animal...I want to set up another QT system that can keep a tang long term if needed and a 20g isn't gonna do it, I just don't have the space
I don't use any type of medication and never did when I did QT unless I saw a problem...IMO,a healthy fish in a stress-free environment will fight off ich on its own if it is fed well and can keep its immune system strong, it just takes time and patients