Hard Corals are Dyin, Soft corals are thrivin'

[Ruth]

Appears like the only thing you have changed is the phosban so I suspect that Harvey is right. No rapid change is readily accepted by corals. I might be tempted to try and cycle the reactor on and off - say on 1 hour off 3 and gradually increase it if possible.

[Gizmo]

I will cycle the reactor, plugged it into a timer.
I'm running 2x250MH 20000k on a 70G.
Using a QuietOne4000 for the return as well as a Sieo 800 for additional flow. My Frogspawn, 2 hammers and candy canes are doing REALLY well though.