Thanks

The cutie in the avatar is an amazing little girl, it's been fun. I'm a proud and happy first time dad.
I'm using a canister filter rated for a 100 gallon tank and a smallish hang on back filter rated for a 30 gallon tank. I'm not using any powerheads as of yet but I might if it looks like the tank needs it. For now, the fish I have arent fast swimmers and dont need lots of flow, so it's working out great.
I had a 75g reef for over a year with just two canister filters and I did just fine, some of my corals were a little brown but they were happy and grew nice and fast, I figure if I can do that with a reef I can certainly keep a small fish population happy and healthy.
As far as ich goes, it just depends what kind of fish you keep. My previous tank my angels and tangs would have died from the ich. This undulated trigger is a completely different story though, he is a monster. Any fish that can survive in Petco's tanks for 5 months is almost impossible to kill. I've always heard hawkfish are tough and able to survive with ich no problem, so I went ahead and got him. My only concern is the six line, I've seen those die of ich in other people's tanks but I'm hoping he will be OK. If he does come down with ich, as long as it doesnt look too bad I'll just leave him in and see how he does. Otherwise, one of the LFS has a bank of tanks they always leave copper in, I can take him there and just donate him, they will treat and resell it.
I almost didnt buy the undulated, it was kind of pale and didnt have good coloration really. Everytime I saw it I liked it but knew it didnt look like some of the undulated I see online. However, when I got it home the transformation was amazing. Within a day it got all colored up and great looking, nice dark skin with bold lines and really orange tail and fins. I guess the stress of being in a 10g tank all day for over 5 months was wearing it down, it sure seems to like the new large space to explore.
One thing cool I didnt know about undulated is it can get pale (seems to happen around feeding time) but it keeps a dark spot underneath each eye, almost like a football player smearing the dark paint under the eye to help with glare.