Substrate or no substrate? And if yes, how much?

bigblue

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Hi-

I'd like your opinion on this. I am of the opinion that a reef tank, even well stocked in rocks and equipped with efficient filtration (including bio) and a sump and a protein skimmer should also have a deep substrate to allow for bacterial colonization. The larger the surface, the more bacteria. I believe that 1.5 to 2.5 inches should be the norm. Substrate could be sand, crushed corals, live sand, ...

One could argue that a larger surface is not that important because bacteria self-regulate themselves according to the amount of food they can process. One could also say that a large surface would inherently become a trap for in/organic matter, and no matter how much bacteria you can have, it will never be enough to breakdown and process them.

What are your thoughts?
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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