Are you testing for individual elements, i.e. CA, MAG, ALk? If so, what are your readings?
For the corals you have your lighting is sufficient, however, your anemone may appreciate something like a t5 or MH. The light upgrade would also provide better light for corals your looking to keep down the road.
Water parameters need to be checked- so let us know what they are so we can better help, as just changing the light isn't going to fix your current problem.