Update- A couple of more fish dead today and last nights Ammonia test did not show 0 ppm but seemed closer to what it was before I tore the pond down with the old water. Can fish Ammonia up a 17X10x4 foot pond in just 24 hours or 36 hours? I have not been feeding them as much as I have been in the past but then there are 50 less. In seeing the Ammonia not being the least my test can display, I loaded some filter bags with Fluval Ammonia remover and some black carbon and placed them in or around the output of one of the filters last night. I also just got some bio media to put in one of the filters used for just mech filtering. It is being rinsed overnight- it smelled plasticy.
Any other suggestions welcome.