I would say that lighitng will wack you upwards of 500 dollars you could keep alot of stuff with PC
lighting , with the exception of SPS
,and anenomes . Yes there are folks that keep SPS
lighting but it is a gamble ..Coraline grows in the darker lighting areas of the tank...If you are ok with DIY you may be able to make your own light
we use the smaller one
As for the anenome attacking it tank mates usually only coral , I have not read of them eating fish. However it could sting a fish , but will not go out of is way to do so if that is what you are asking ..... Some folks can't feel the sting of an anenome or are not sensitive to them , while others will require an emergency room visit.