well i guess my questions now would be....because it a different type filter..this one has one big fat sponge inside..it was wet, and as im out atm..i brought a tub of my tank water with me and put the sponge in the tub with the water..hope thats right?!
That should be fine until evening, when you can sort everything out
How/where do i put the mature sponge??? or do i get this one up and running....and continue the first tank cycle as i have been doing?
What media does the current filter have?
You can swap current media with the new, cycled media so your cycling filter will be insta-cycled (still do the qualifying week). If the new filter is compatible with the cycling tank, in terms of size, you can put the whole filter in and remove the old one or keep the old one in too. If you want fish in both tanks, you can split the media in half (cut the sponge) and share it between the two filters, so each would be half-cycled.
For reference, a half-cycled filter can already support *some* stock or can be fully cycled to support full stock usually within 2 weeks or so (including qualifying week).