Just on my tang, I have noticed a few spots on him. Immediately I performed a water change and have dropped salinity slowly from 52 on to 49 on my meter... I also did a powerhead sweep of all the rocks and cleaned up the debris, then changed the filter socks and changed out the carbon and phosphate (even though it was two weeks old)... I have been feeding him frequently and soaking the food in selcon.. He is to healthy for me to catch, I have a trap but I fear putting him in a 1-2 gallon tank wont help him. How much lower can I drop the salinity??? What are my next steps??