You shouldn't need any additives at this point really. Water changes will replenish everything needed, including the iodine some will claim is needed by the Xenia. Until you get some scleractinians, you don't really need much of anything else.
I would however suggest getting test kits for alk
to prepare yourself if you get stony corals. They will use up a fair amount of CaCO3
as they grow and more might get added. If you plan on a softy only tank, then the water changes should do pretty much all you need.
When you get the new lights, be sure you acclimate the tank slowly each day if a much higher intensity. If PC
, start off with about 4ish hrs for the first few days and then increase by Â½ hr every few days afterwards until upto the proper photoperiod. If the actinics are close to the total output you have now, then just run them as normal and vary the new daylights.
, run the lights as you normally would except shade/difuse the light instead. This will give the corals a better chance of adapting over a slower period and still allow for enough light. Usually using several sheets of screen door material (about 3-4) will do fine from HD
. Every week or so just pull one sheet off until all are gone. Less light demanding corals like the cabbage leather should be moved down in the tank or even shaded with MH