sps problem

[tropical hawaii]

I have been trying to keep sps for about 6 months now. And for some reason I cant. They just seem to slowly die and I need to find out why. Alk 9, ph 8.2, calcium 475, ammonia 0, nitrite 0, nitrate .5 salinity 1.025, and my light are 2-250 watt mhs and 8-65watt anctics, plus I have a g-2 skimmer and a refugium, and 4-koralia 3's on a timed wave maker. It is a 125 gallon tank with 100 lbs live rock and 3" sand bed. Plus I us only ro water. Can someone please tell me what am I doing wrong? Also my tank has been set up for about 2- years.

[kar93]

What are you phosphate levels?

[useskaforevil]

what other corals are you keeping? how do they die? do they bleach or lose tissue, or what?

[danceswithfish]

Stability is an important thing with sps. Do your parameters stay rock solid or do they vary. I would visit the sps forum. There is some great threads there at the top of the forum for beginers

[danceswithfish]

Oh ya, what is your water temp?

[IndyReefMan]

How do you measure salinity, and how do you calibrate the device?

[BLKTANG]

Sounds like your not acclimating the corals to the light correctly.