I agree that water changes are probably the best thing for a healthy reef.
I add 2 drops of lugols every week, 1 tsp of Tech CB 3X a week, & 1 tsp of Tech M every week on a 29 gallon. I wouldn't add the iodine at all if it wasn't for my large xenia colony that seems to love it, and for the past week I have lowered that to 1 drop.
I also test all my water parameters every weekend.