SPS newly question

[Treebeard]

pH: 8.1
Ammonia: 0
Nitrite: 0
Nitrate: ~17
Phos: 0
Ca: 440
kh: 6.4
Alk: 2.29

Two Phos reactors, one running carbon, the other rowa.
Vertex in 180 skimmer
Refuge and chaeto
MP 40, (adding a second on the weekend to try to get a gentler wave action)

Tank is 75F

Fishy friends include a green spotted boxfish, hippo tang, sailfin tang, royal gramma, anenome fish, lawn mower blenny, matted file fish and a leapord eel.

Approximately 70 lbs live rock.

Thanks!