Help Seeding A New Tank

[confusion]

I set up an old 10G aquarium to house some pregnant swordtails and mollies about a week ago. I have been trying like mad to get it cycled, but I'm not having much luck.

I have 3 other well established tanks (~1 year). Here's what I have tried:

Pulling filter media from each of the other tanks and putting it into the filter of the 10G
taking bio-rock (seachem matrix) from canister filters of other tanks and putting it into the filter of the 10G
taking gravel from the other tanks and putting it into the 10G

I've done these at various times throughout the past week. I have been keeping the ammonia pretty close to 0. I use prime to dechlor the new water each time.

What on earth do I need to do to get this tank established?

 

[celaeno]

i've heard and experienced wonders with marineland bio-spira. just make sure you get it when the weather's not too warm, or the bio-spira will most likely have 'spoiled'.

 

[confusion]

When I first started with aquariums a little over a year ago, I went the bio spira route. I wasted over $100 on that stuff from 3 different places, followed the directions to the letter and it didn't do squat, so I'm a bit skeptical. Plus, I feel like I should be able to get some amount of bacteria from my other tanks transferred into this one.