Using fish pond water

I have a pond full of fish, always bubbling. The water is filled with nitrogen and ammonia, ie: fish waste. It should be good for fertilizing my crop, but I am unsure if I should be converting the ammonia to nitrogen via bacteria.

When reviewing aquaponic sites, some convert by running the water through bacteria filled gravel, other simply use the water directly.

My plants are in dirt, not hydro, but I can still use the water.

Would the plants be happier with the ammonia, or more nitrogen? Can they use the ammonia at all?

If I have excess fish, can I use them? Grind them down and introduce them where and how?

yes, you can use the fish directly, but the water would be better if filtered through a bacteria basin. use a tote with screening rolled up inside and habe the water flood and drain from it from the pond to either a flood friendly grow medium, or a container to hold the rich water for use, with an overflow to go back into the fish water. this dude shows it at about 4 min in [video=youtube;pmzEgZ81uak]http://www.youtube.com/watch?v=pmzEgZ81uak&feature=related[/video]

i do this outside with soil and ap veggie garden. yes, you can just grind fish, bury, but watch out for varmint if you're outside. native americans and i'm sure other cultures have done this for centuries, burying whole fish next to plants.