Kenya tree problem

[Kiayarsh]

The tank is setup for 1 year now and I add some corals ( it's mix coral tank) to it almost 2 months ago and they doing fine I had little bit problem with ligh an coral placement but is fine now however my Kenya tree is got white I don't khow what's going on.
the po4 is 0.20 and no3 is 5 partperm

 

[tzabor10]

They can look fussy sometimes. And then they take off and grow like weeds. Give it time and stability