Let's start with how big is your fish tank, what kind of fish do you have in it, how many fish do you have in it and how big are the fish in it?

As for adding ammonia to the fish tank. I advise against it.

Feed the fish twice a day all they will eat in 5 minutes and they will give you your ammonia providing there are enough of them and they are big enough to do the job. Otherwise add more fish or get bigger fish.

It is never necessary to add ammonia to a system if it is set up properly with the correct amount, size and type of fish.

Your fish are the engine, the fish food the fuel and ammonia is what you get; which the bio-filter, once cycled properly, will turn into all the nitrates necessary to feed your plants and clean the water to be returned to the fish.

Treat your Aquaponics System like a birthday cake.

1) Bake it
2) Put the icing on it

AND most important

3) Keep your fingers out of it 'til it's time to cut for the birthday party.