along the lines of iodine dosing.. my lfs (very reputable) told me to dose daily as well. Only I was told to dose 1 capful daily until testing showed the proper levels. Then to dose only 1 or 2 times a week as needed. I have a 90gal. I was having the same problem as the thread starter with the "melting" corals. This problem is no longer a problem.
Good luck..hopefully you can find the "happy" medium/balance for your tank
I'm a newbie too. I went from happily maintaining a 5 gal for 6 yrs and then made the leap to the 90gal. I'm still hoping to get a "system" of my own for maintaining the tank. I had water clarity problems, nitrate problems, etc. I have now gotten rid of those as well. I can tell you that filtration and water changes are your best friend