ICP Results are Back. Help Me Figure This Out!

[InkedReefLady]

This is a tag along from my other post on why some of my encrusting montis and setosa are dead/dying.

I did a new ICP test and the results just came back this afternoon.

The Ca and Mg are pretty close to what I got over the weekend on my Sailfert kits (I have been dosing some Ca this week to get it increased a bit). Alkalinity continues to stay in the 10.5-10.75 range with no dosing (;Sour). No3 has been 2.5 PPM and PO4 0.05 PPM.

Other than lowish iodine and strontium, does anyone see any other red flags? Would this be the reason my SPS are dying? Coraline algae has practically covered the back and sides of the tank and starts to grow on the frag skeletons after they're dead. I would have thought we were in great shape for SPS.

My second idea is lighting, but I cannot change the spectrum on the ReefBrites XHOs (3x) and can only use the tuners on the Kessils (2x).
I used the Seneye to get a PAR reading a while back and I was in the 90-250ish range. I know plenty of people who grow SPS in this range; even some that I had that have now died.

Thank you for the feedback!

 

[Charlie’s Frags]

Your icp results look good. I’ve had much higher arsenic levels with no negative effects. Acros and most sps will do better at an alk 7.5-8.5 with your no3/po4 and 200 par and up.

 

[InkedReefLady]

Your icp results look good. I’ve had much higher arsenic levels with no negative effects. Acros and most sps will do better at an alk 7.5-8.5 with your no3/po4 and 200 par and up.

Everything was doing great up until a few weeks ago. But it's mostly just one side of the tank. It's so weird. I really thought something was a-miss and ran the ICP. Guess the alk just needs to be brought down.