Don't dose what you don't need. I would only dose the B-Ionic, the rest of the trace elements etc will be replaced by water changes. From here you should definitely find the source of the nitrate issue. Skimming efficiently is probably going to be a big help, but I would still be concerned as this may only end up helping, and not irradicating the problem. Your bioload in comparison to your biological filtration, including a clean up crew would be the best places to look for a root cause answer. I have 6 T5s and a 250w HQI in my canopy, and my return is a mag5. My temp stays at 78. Was your tank above 80 consistently? Running fans across the water of your sump will help decrease the temp, and is an inexpensive solution. I don't think your corals will like the fact that you changed their lighting around so drastically.... and if you move them back at the same rate, you could fry them.


edit: you could be going through a cycle since you just moved your entire tank...?