For successful keeping of Green Guppies, the key factors are tank cleanliness, peaceful tankmates, and a well-balanced diet. These requirements, universal for most aquarium fish, require a more detailed understanding. Due to their modest size and unpretentiousness to environmental conditions, Guppies can live in a relatively small aquarium, equipped with a minimal set of equipment, provided regular care. This care includes timely removal of organic residues, be it uneaten food or excrement, as well as weekly partial water changes with fresh water, possibly more often. If the number of inhabitants does not exceed 2–3 fish per 10 liters, a simple airlift filter can be used. However, with denser stocking, a full-fledged internal or external filter will be required. The water preparation process usually does not cause difficulties, as Guppies show high adaptability to a wide range of hydrochemical parameters. Often it is enough to let the water stand before pouring it into the aquarium. As for feeding, the daily diet can consist exclusively of dry foods, but it is important to ensure that they contain all the necessary vitamins and trace elements. Specialized foods developed for this type of fish will be an excellent choice. It is also desirable to introduce frozen and live foods into the diet, such as Artemia, bloodworms, or daphnia. In terms of behavior, these fish are distinguished by a peaceful disposition. Although males compete for the attention of females, this usually does not lead to serious skirmishes. Their "display of strength" is limited to spreading their fins and swimming slowly opposite each other. Guppies get along well with most other species of comparable size.