How old do guppy fry have to be so that the adult fish cant eat them?

Guppy fry are born live and are fully formed, but they are very small and vulnerable. Adult guppies will eat their own fry if given the chance, so it's important to take steps to protect them.

One way to protect guppy fry is to provide them with plenty of hiding places. This can include plants, rocks, or other decorations in the tank. The fry will use these hiding places to avoid being eaten by the adults.

Another way to protect guppy fry is to feed them regularly. This will help them to grow quickly and become strong enough to avoid being eaten. The fry should be fed several times a day, and the food should be small enough for them to eat.

Finally, it's important to keep the tank clean. This will help to prevent the growth of bacteria and other harmful organisms that could make the fry sick or weak.

If you follow these steps, you can help to ensure that your guppy fry grow up to be healthy adults.

As a general rule, guppy fry should be kept separate from adult guppies for at least the first 4-6 weeks of life. This will give them time to grow large enough that the adults will no longer see them as food.