If one fish is showing signs of the ich growing on it, it is in the system, and it's a question of whether or not your other fish's immune systems will be able to fight it off or not. If it is already in your display tank, the stress from removing it from there may be enough to kill it, and stress the rest of your fish to the point where they get it as well. Good quality food, such as frozen mysis, soaked in garlic, can help. As far as engineer goby's eating ich, I have 3 in my system, and never seen any signs of them "cleaning" any fish. I have a neon goby that is constantly cleaning the fish, and a pair of cleaner shrimp that do it on occasion as well. When I used to have a regal tang, it went through the 6 week cycle of getting ich, and then it dropping off, before getting it again. It never had more than a few spots that the cleaner shrimp and neon goby would eat off, and always appeared to be happy, even with the ich on it. None of my other fish got ich, even though the regal tang did. I now quarantine all my fish for a minimum of 4 weeks, and have not had ich in my system since last May, when I had a tank crash.

I have read this also but the neon gobie is suposto be a better choice as it is a natural cleaner. Yes they eat theick and not just pick it off like shrimp some times do. I like the neon gobie as they add more color than the engineer gobie dose. White stripe veres a neon blue stripe both are nice fish and you can have a group of them but add as all at the same time.

Bill