Radion vs halide help

[Proteus]

K. I set up a cube tank. Took Rick and water from existing tank. And also added 5 gallons of fresh mix ro water. No carbon or gfo yet.

Bulbs from other system were replaced may 5th. All water perameters are good.
I dosed old system every three days so I don't suspect alk

I use salinity salt and salinity is at 1.025

I am doing a water change as I have always scheduled before adding prodibio

The only thing I can suspect is that corals were on frag rack of old tank while I pulled rocks up to put in new tank possibly contaminating water. While I did this I primed water. And coral was only there long enough to allow cube to clear.

I'm not suspecting lights but don't want to rule them out