Brown diatom dust

[Myka]

Originally Posted by Metrontech

I am doing calcium and iodine daily and other than that I doing my weekly 7-10 gallon water changes

Iodine is really good at helping algae grow. I would not be dosing iodine daily. Your tank where it's at right now probably doesn't need any dosing at all - especially not iodine.

Are you testing calcium? I doubt you need to be dosing calcium at this point. Generally, as a tank gets stocked, alkalinity is the first thing a person will need to dose. I even test alkalinity and dose accordingly in fish only tanks as it helps to keep algae from growing. Also, increasing calcium will lower alkalinity and you will get really out of whack. Corals are much more sensitive to alkalinity than calcium.