How to prevent angelfish from eating their eggs

[fishy100]

My angelfish kept eating their eggs no matter what I did.
Sharing my method to prevent angelfish from eating their eggs and saving as much as possible fry:

https://youtu.be/9Evw9OsdzkQ

[Dr Who]

Remove them. Put into a gallon jar with rain water if possible. Tap water will work.Put in one drop of malicate sp green and a drop of methylene sp blue. My pairs spawn on slate. Put egg side on downside. Add air that is so slow that you can see thru the bubble as it rises to surface. To much circulation will destroy the eggs.
I spawned angels for a living at one time.