I've done it for dino's:
For a week prior to, I pulled out as much as I could by hand, doing a 20% waterchange every other day immediately after. Cut feeding by half.
Then, one last dino harvest followed by waterchange. Unplugged the lights and wrapped the tank in a blanket for 72 hrs (continued to dose chems but stopped feeding as well). At the end of the 72 hrs, turned on the lights, pulled out the last few remnants of dinos, and did another waterchange.
I had to do this twice--it really devastates the dinos (corals didn't seem to be much bothered), but they did come back the first time. It's been 4 months since the last time I did it--no dinos.
Lemme know if you have any other questions.
I'm from Oldham Co. originally.
Tyson