My platies were not a very good strain, lots of health problems so I've kept their fry, split up on separate tanks so the next generation never gets to breed. The first guppy lot since I started up the hobby again also had health problems, so kept those- and they died prematurely anyway. The fry of the second lot I bought are a lot healthier, but quite a small batch, am keeping those for pleasure (again split up according to sexes).
Am selling bristlenose fry, and swapping portholes for other fish.