Cool. I'm still curious though, what is the purpose of having the Fluval on the system? Water flow? Carbon? You didn't mention a specific purpose for it, and if it's just temporary or serving a very minimal purpose...in my opinion it would just be better left off in the first place.
You can cycle a tank with cured liverock, it is a proven known quantity,
I would be interested in seeing your references on this. If by "cycle" you mean ready for introducing inhabitants...then I might agree with you. With cured LR you're already set to go for some inhabitants because the bacteria and organisms are established and ready to go (having made a comeback from the previously occuring cycle). If by "cycle" you mean that it will kick start ammonia, nitrites, etc...then I will tend to disagree with you. As I said before, the die off from the LFS drive to the house isn't going to make any difference in a tank. And as for the use of a cycling product off the shelf, well, I'm just not going to get on the soapbox about how there is nothing beyond sketchy anecdotal evidence that this kind of thing even does much.... It's not going to HURT your tank...but it may not help it much, either. I say save the couple bucks for your clowns and drop $o.13 worth of cocktail shrimp in there.