Clown Fish have Ich how do I treat properly?

[George]

I think it's marine ich. Brook kills fast, within days if not hours after you notice the symptoms. Other than dying quickly, fish with brook are also producing excess mucus and having cloudy eyes. Your fish don't have those symptoms from the pictures.
BTW, anemone can host captive breed clown.
To OP, are you willing to catch all fish and put them into a quarantine tank, treat the fish in QT and leave the display tank fish-less or 9+ weeks? That's the only way to get rid of ich in your DT. Other methods are just band-aid solutions.