Biomedia for use in Frag Tank

[>>klong<<]

I am planning on starting up a 20g long frag tank. I currently have a 20g cube display that has about 10lbs of rock and a package of Marinepure Biomedia gems in it. I've been running the tank like this for about 2 years.

I don't want a ton of rock in the frag tank, so I'm considering two different options.

1) I could move some or all of the Marinepure from the running 20g to the frag system
2) I could use some Eheim Substrat Pro from an old freshwater canister filter I have, placing it in my 20g for some time to seed it with bacteria.

Are either of these options better than the other? If I were to use the Substrat Pro, how long should I leave it in my cycled system before moving to the new tank? Are there any concerns with using recycled freshwater media?

Thanks.

 

[GHOSTLY]

Buddy of mine. What he did is he setup his 15g(?) Frag tank and took one piece of live rock and some media from his 160g display and just let it sit in the display. Its convenient for anemones he said since they'll usually just stay around the rock

 

[SilvermistInc]

I just have a bio brick in mine