Hi! And
As you mentioned, your tank is going thru the cycle. A cycle can take as long as 8 weeks to complete. My cycle took about 4 weeks; every tank is different.
Your ammonia will be the first thing to go up; then it will go down as your nitrItes increase. Finally, nitrItes will give way to the nitrAtes.
You did not mention anything about an ammonia reading. Are you able to obtain an ammo test kit? Knowing where your ammo is will guide you in where you are in your cycle. Since your nitrItes are getting up there, it looks as if you're in the middle of it.
It sounds like you are doing everything right to keep your fish healthy. Keep up with the water changes. You want to keep your nitrItes as low as possible. Keep salting; salt protects the fish from the nitrItes.
Are you adding any conditioner to your water when you perform your changes? Prime is an excellent product if you are not already using it.
Now, if you really want to speed up this cycle process, and you can afford it, maybe you can purchase a product called BioSpira. I used this, and I believe it is why I cycled so fast. Here is where you can get it:
http://fishstoretn.com/bio_spira.htmlHang in there....it's a grueling process. Good luck! Keep us posted! And feel free to ask any questions!