Corals can also produce waist but very small amounts. Also things that live in live rock and the live sand will also produce waist.
Anything that produces waist will increase those number, but at the same time, (especially the ammonia) should not be going up. If it is then this means
1. Things are prducing waist but it isnt being processed corectly
2. Things are dying and there is no way of processing that either.
This is were the nitrogen cycle take role.
When waste is produced, it turns to ammonia. The ammonia is then transformed into Nitrites by organsims in the sand. Nitrites are then made into nitrates by organisms on the rock The nitrates then create algae and other things that are then eaten and are turned back into waist. This is why it is called the nitrogen cycle.
If something is not doing its job in the this cycle, number, deadly numbers, will go up.
Do you have a skimmer on your tank?
And if your reading some ammonia then that has to go away, as this is a killer.