Brad, I added between 1 or 2in. of sand to my 90g. Its a larger grain size also or at least larger than the really fine bed. Just regular Carib-Sea, likely 1 -2mm in size.
Now dont ask me why
. It looks purdy for now. As you know, I really am a bare bottomed fanatic. I was going to run a plenum in this tank but a few things turned my thoughts this way.
I,m prepared to siphon and replace some on occasion if thats needed to maintain it plus I plan on adding a lots of narcissus snails and some fighter conchs when the bed is mature enough for them. Its been close to 10 yrs, since I have run any sand in one of my tanks, so I guess we will see how it goes.
I may add I have never had any cyno since not having any sand. One sign of it and out it comes. Cyno and sand seem to go hand in hand.