[i have crabs]

garlic and the cleaner shrimp will only help control the problem it CANNOT get rid of ich it will only get them through the break out at best at wich time they will probably fight it off and seem healthy,hypo will and does work however its not a good choice in a main tank as it will kill your live rock and any inverts, copper will also kill the rock and inverts and will make the tank no good for inverts ever again, so ive tryed all 3 ways and moving all you fish into a qt tank and using copper for 1 month is the only way i will ever do it again the hypo caused a bacterial outbreak and kill more fish than the ich did wile the copper had no bad effects that i have seen other than wrecking the tank.