What you can do is maintain the PH in the home aquaria for a week or 2 at best dosing high amounts of kalkwasser.
It'll be enough to make your tank water cloudy, but it won't hurt anything unless you make it super cloudy, like white and not transparent white.
Dose enough just to be able to see your corals. Milky white.
By doing this, it maintains the proper PH to stunt dino growth, so in a span of 1-2 weeks they'll be gone.
You can do the manual removal, but they'll end up coming back.
Lights can be turned off for a few days, but it's still not enough to demolish them.
That'll also stress out your corals if you're doing 2-3, 3 day black outs for your corals.