Coral woes.. Help a newbie.. You once were one!

[carriej]

WHOOPS. Knew I was forgetting something.

Tank is a 125 gal 6 foot with approx 30 gals in sump. Bubble magus skimmer, lighting is an ATI sunpower 6 bulb 60" t5ho.

I do about 15 gals water change weekly, livestock is a pair of clowns, and a chromis. Some snails and two hermits. A cleaner shrimp named Francois (lol).

Tank has been running since Oct. Just added corals not quite two weeks ago. Have a few other things that are doing well (frogspawn, Duncan, etc)

My levels are as follows:
Ammonia - 0
Nitrite - 0
Nitrate - 0
Phosphate - 0
Calc - 400
Alk - 8
Temp - 78
Ph - 8.2
Salinity - 1.025

I am using two 1400gph powerheads and a 900gph return pump.

Thanks in advance!