hi,
I have used Natures Ocean for several of my tanks. Here is the deal with it.
No matter what your tank must cycle, via LR, or dead shrinp method...ect.
You may add Natures ocean when ever you want and it will not cause your tank to "recycle"
as opposed to adding more LR of LS which may have some die off and cause a "recycle".
there is no such thing as an "instant cycle" product that works.
with that said, you could use or buy LR or LS that has already been "cured" and you may not experience a cycle. It all really depends on how much die off you have.
so, Natures ocean contains bacteria only, no critters that could die, there for it wont cause a cycle.
hope this helps.
-Oozy-