Purple Up - for accelerating coraline algae production. I used to add this a few times a week but now have slowed down to about once a week.
Carbonate - I think this is part of the
calcium additive that I use. I'll check when I get home from work.
Buffer - I add based on what my
pH is. I'll figure it out what levels I need soon enough.
The rest - I add one cap each for my 65 gallon tank once a week. The iodine is good for the shrimp. The rest is good for the corals. I was also told by my
LFS not to add calcium and strontium on the same day as they basically cancel each other out.
Hope this helps. I'm still trying to figure some of this stuff out myself.