I decided to give the tank a dose of iron, like many of you have suggested. I also received the same recommendation from Jason at Aquarium Design. He also recommended that I check the light lens to be sure it was salt-free so that the light could shine as intended.

My chaeto started breaking-up before I changed anything, other than having added a number of new corals. Fuge water flow remained steady and slow, but it definitely was not stagnant. Jason suggested that the corals and chaeto may be competing for some of the same minerals, so he recommended I dose more regularly with B-Ionic (daily instead of every 2-3 days) and to add iron on a weekly basis. I've already given the tank its first dose. I'll post again when I notice any improvement or change to the chaeto. I pray that I won't have a algae bloom ! !