Platys are social fish who live in shoals and do not swim in group with other fishes. Barbs and Tetras are known for swimming together, but even though Platys do not practice it, they are more active when they are together. This is why having an aquarium full of Platys would be a smart idea because it would help them a lot develop their dynamism. The minimum number of Platys recommended for an aquarium is four or six. However, the dimensions of the aquarium are relevant as well.
It is suggested as well that for every male there should be three or four females, because in this way the attention of the males will be focused on the females and not on the competition with the other males. As far as water temperature is concerned, 80 F would more than adequate and the level of pH should vary between 7.5 and 8.2. Hardness is important as well and if you keep it between 15 and 30 dGH, it would be more than perfect.
Your Platys need to live in clean water and even though you only have a few of them, these rule has to be respected every once in a while. Platys will live in a healthy environment and their attitude will express content and happiness.
Every Platy female has to give birth in order to continue living and after the gestation period (which varies between 28 to 35 days), almost fifty fry can be brought into world by one female. It is interesting the fact that Platys are prolific fishes and thus it is easy for them to manage to breed. Even though they can easily create new fishes, Platys are famous for their appetite towards their babies. Thus, they are able to eat them as soon as they were born and if you keep Platys in an aquarium, you should be quite attentive to this element.
The first step would be to keep the fry away from their mother, by placing them into another aquarium. Plants, breeding traps are other useful methods in order to keep the fry away from its parents. As a bearing fish, it is quite common to be interested in eating them right after they were born. Science defenses this aspect and proves its relevance using the behavior that describes this species of fish. However, it does not mean that there cannot be taken any measures.