I will reiterate this and reinforce. Just try a one bucket change. Do it right and thank us later. Come back and report.
Don’t know if you have a barrier for doing a WC like no RO DI, no mixing equipment, no good fish stores with quality premade salt water (my LFS even ICP tests his RO), etc. But whatever the barrier is try and get past it and give your corals and tank what it needs.
We are not trying to be mean here just speaking from experience and trying to be helpful.
I am very detail oriented when it comes to my tank and notice small changes in my corals. Even with weekly water changes and dosing All For Reef on a dosing pump to maintain chemistry, I still see a big positive difference every week when I do the change Every tank I’ve ever had responded positively to water changes. It just makes scientific sense, that fortunately you can also see with the naked eye.
It’s a lot of work and I’m currently thankful I’ve got some saltwater ready to go already for this weekends change :)
Best of luck to you. Let us know if you decide to try it out!