Thanks for the suggestion. I should be a little more clear on what is happening. The parents don't eat the hatched fry. The last two batches of eggs failed to hatch, that's when they eat them and start over. I've read it could be diet among other causes. They are getting Reef frenzy and Fertility frenzy frozen food with some supplemental pellets.
I could remove the pvc pipe and place it in the fry tank ahead of time with an airstone also or try your technique. We like watching the clowns do their thing to take care of the eggs, well until they start moving my frags around, but even then it's still pretty interesting and it brings my family to the tank everyday to see what is going on. There is also a point as a hobbyist where I can be too successful with this. I have been in it for the nature aspect, the challenge of raising them, and letting my son help with the process. I have 19 clowns that are 45 days old and they need to be 90 days old from what I have read to sell. So there is the potential to have a hundreds of clowns by the time 90 days rolls around.