How do you stop platys from eating there babys?

* Remove the parents from the tank before the fry are born. This is the most effective way to prevent the parents from eating the fry. You can remove the parents to a separate tank or breeding trap.

* Provide plenty of hiding places for the fry. This will give the fry a place to hide from the parents. Plants, driftwood, and rocks can all be used as hiding places.

* Feed the parents regularly. This will help to keep them from being hungry and eating the fry.

* Don't overcrowd the tank. Overcrowding can stress the parents and make them more likely to eat the fry.

* Cull the weakest fry. If you have too many fry, you can cull the weakest ones. This will help to improve the overall health of the fry population and reduce the risk of the parents eating the fry.

Here are some additional tips:

* If you see the parents chasing the fry, remove them from the tank immediately.

* Don't feed the fry live food. Live food can be contaminated with parasites that can harm the fry.

* Keep the water in the tank clean and well-oxygenated. Poor water quality can stress the fish and make them more likely to eat the fry.

By following these tips, you can help to prevent your platies from eating their babies.