Hello Everyone :- My tank is 125G , 3 month old , only 2 Tangs there , 1 Yellow since more than a month and a purple tang been there for 2 weeks , i went with all needed procedures to be sure introducing will be good , and they are just perfect together , no fighting or anything , they are very good size , eating well , yesterday i have noticed some of very tiny small white spots on my purple , that when i start reading like crazy about the ich , i know the question is repeated but i just wanted to be sure. considering the following what is the best to do :- 1- Have corals (softies) in the tank 2- there is no way i can catch the purple as she is fast and there is lots of places to hide. 3- don't have Hospital tank and its hard to get one but it's not impossible. 4- water quality is good except S is 1.024 if you consider this bad. temp is 25C My purple move eat and he is really good faty one "AT LEAST FOR NOW", i know i can't add any new fish for the next 60 days maybe or even more which is bad , i was waiting this coming shipment to start my pradetors , but is it safe to add corals ?? or even corals will have effect by any how ?? any idea about what i can do to avoid the death of fish ? i know feeding vary foods and garlic thing and maybe some changing to water !! what about the 1.024 '? need to be reduced to 1.021 ? tempreture wise ? Thanks everyone.