If your female guppies were with males, they are pregnant and good for up to 6 batches. Should you put them with other males, who the father is can be changed, because newer sperm will more likely fertilize newer ripening eggs.

How long have you had those females? It takes roughly a month to produce fry. One sounds like she is futher along that road than the other. (Please read up in the Quicklinks under fry and pregnancy on how to keep the adults from eating them.)

It would be very wise to have a pump and filter - I would really suggest that a sponge filter (of which there are several kinds) would be best for a fry tank. The more exposed surface area on a sponge filter the better. But any sponge filter is better than no sponge filter.

If you can run that sponge filter in the tank where your females are now, do so. That way it will be ready (biologically active) for the fry's tank, when they are dropped.

If you can, put a little extra gravel in the adult's aquarium now. When the fry are born, scoop them into a jar or leave them in the breeding net (or get the adults out into a jar temporarilly). Take 60-70% of the water for the new tank from the parent's tank (and replace it as you would in any partial water change.) Line the fry tank with gravel from the parent's tank (if you want gravel). Set up the sponge filter in the 5-gallon tank, add the fry and the tank should be ready to go.

If there are a couple of small pond snails on the premises, drop then in with the fry. They can clean up that odd fragment of uneaten food.

Planning for your fry now, greatly increases not only their survival but also their growth to a larger, more colorful size. You are exceptional, among newer (and even experienced aquarists) in making plans now for a fry tank! :)

Applause! Applause!