Ok, so as some of you know, I was considdering getting a 20g long but may end up going a little larger due to stocking and such as well as a few fish I wanted. Question on media for cycling before I add anything just to kill it accidentally. Would that nasty looking gross thing in my filter on my 10g that looks like a white loosly packed sponge be what I need to put in my new filter to cycle it or should I just get a small bottle of bacteria starter junk from my LFS that says it will "introduce beneficial bacteria to your tank and shorten cycling process" because the goth chick working there idt has ever hada fish tank. =\