You need to work on cycling that tank before putting any fish in it if you can. One thing that works for me for a rapid cycle is to seed the new filter by cleaning the existing filter on one of my other tanks in the new tank. Even a poor clone done that way would be plenty to deal with a few guppy fry. The bacteria colony could grow with the fish if you avoid any overfeeding. Once you have a good filter established in your tank, you could indeed add some pygmy cories, but that is not your present priority.
Sorry my bad, should've stated that i meant add some pygmy cories to the 2ft tank.
I have instructions on how to build a small sponge filter for the fry tank and so will build that. Then should i just pop a sponge from the 2ft tank into the fry tank for a while, then put it back in the 2ft tank filter?
Xxx~misscosmo~xxX