It looks bleached , not happy and dying ,how long have you had it ? . Are you feeding it ? IF not start feeding small pieces of silver slide or mysis 2-3xs a week.
Your lighting is NOT nearly enough for an anenome let alone some shrooms
it would be fine for FOWLR
As for the NitrAtes set up to do a largish PWC
of about 50% , after that continue to do regular H20 changes of 10%- 20% weekly , this removes the build up of any kind of wastes and replaces trace elements ...