Have 6x the required filtration for your tank size, get dosing pumps, put on double the needed light for everything, over feed like crazy and never do a water change.
And that's the secret lol
Oh and only buy the colorful corals.
I have a deep sand bed first of all. An ASM G-3 skimmer (for 300gal tank) and a fuge with a deep sand bed in it and is currently growing chaeto around the clock.
I also have a phosban reactor rated for 150gal running around the clock. A nice sized clean up crew of cerith, nassarious, and Astraea snails. Serpent Star fish. And all the little critters that live in the tank.
Oh and a bubble mangnus dosing pump unit
I traded an old iPod for 130lbs of used dead rock.
I cycled it in a barrel for three months. Bought 10lbs of live rock from the LFS (told them to give me the gnarliest/oldest rock they had) and incorporated those into the scape with the cycled rock to seed it and the tank.
Thanks