Certain corals hate ich attack. If you have a reef tank, watch your corals very carefully.
A much more effective treatment to keep the ich at bay is using a garlic/vitamin soak. This stengthens the fish's immune system and helps the fish physically fight off the ich. Try using GVH Garlic/Vitamin Soak. I've had excellent results with this exact product. I know it feels like you need to treat ich with an ich-killing product, but this stuff really works well, athough it will not cure the ich in your tank, but neither will the ich attack.
I would use the GVH long before I'd put Ich-Attack in my tank. Ich attack kills single-celled organisms. Although it says it's reef safe, it does not discriminate in killing single-celled organisms... it will eventually kill them all.... and there are a heck of a lot more single-celled organisms in the tank than just the ich. Keep that in mind if you're going to use it.
There is no copper in Ich Attack.