Guppies are very small fish whose bio-load is also very small so they don’t really need much space to live normally.
Firstly I hope your fiance have fish-keeping experience and love fishes. With regards to tank mates for guppies, you could consider neon tetras, swordtail or even mollies.
If you want to learn guppy fish breeding then you will need to set up a tank that separates the fry from the adults. You can buy guppy breeding tanks for your guppies, or you build one and this can be costumed done for a variety of objectives. What your objective is will determine some of the needs in equipment and supplies. You may decide to go to guppy breeders for the guppy fish information and to purchase fish breeding tanks, these tropical fish need care if you want healthy fish, so always try and find the best information for the breed of fish, in this case male guppy and female guppy fish.
Guppy and Other Livebearer Fish Care Resource
Livebearer Fish - Guppy, Molly, Platy, Swordtail
Guppies can be kept in a community tank, although it is best not to keep them with aggressive fish. It is best not to keep them with large fish. I've seen large angelfish swallow adultmale guppies whole, however, they can be kept with smaller angelfish. Guppies are about the easiest fish to breed in the aquarium. Guppies engage in internalfertilization. The anal fin of the male is modified into a gonopodium and the male uses this toinseminate the female. Female guppies can store sperm for several months and can produceseveral broods without further fertilization.Poecilia Libestes Reticulata, a fish commonly known as the Guppy, is a very popular aquarium fish. It is particularly suitable for novice aquarists since it is easy to keep and non-aggressive. The Guppy belongs to the Livebearer group and will give birth to free swimming fry instead of laying eggs. The Guppy originates from fresh and brackish waters in South and Central America, but can today been found wild in other places of the world as well, including Florida in the U.S. The Guppy has been deliberately set free in several Asian waters in an attempt to combat malaria by decreasing the number of mosquitoes.You can choose between numerous Guppy fish variations, differencing in the shape of the body as well as the colour of the fish. The most common colours are red, green and blue. Guppy variations include Veiltail guppy, Lacetail guppy, Lyretail guppy, Flagtail guppy, Bottom and Double swordtail guppy, Long fin guppy, Fantail guppy, Red tail guppy, Triangle tail guppy, Rounded guppy, Fancy guppy, Tuxedo guppy, Glass guppy, Grass guppy, Mosaic guppy, King Cobra guppy, Snakeskin guppy and Peacock guppy.You will know when your female guppy is pregnant because the dark gravid spot on her abdomen willbecome larger and she will also get fatter. Guppies are livebearing fish and thefry emerge from the female fully developed in about 4-6 weeks. Adult guppies will eat their fryand so the fry must be separated from adult guppies until they are larger. Sometimes plants willcamouflage baby fish, but I've often found that it is safer to keep them separate from their parents.Guppies are often kept in community aquariums since they are so peaceful. They do however prefer to be kept in species aquariums, since other fish occasionally assault them by nipping their long fins. When several Guppies are kept together they will form a beautiful school.