I don't know what I am doing with breeding yet, I am still learning, but I do have some 3 wk old fry. I have a sponge filter that is very high as well, I tried turning it on it's side & when that didn't work just filled my tank more (this was all done before I found this site & all the useful information). The outflow was heavy, so I put a sponge on the end of it to break up the air bubbles. My filter has been in and on since I put the spawning pair in the tank and I've had no problems with it this way.
If you wait, someone with more knowledge then me will be able to answer your questions better than I though.