I'm new to keeping cichlids so forgive the questions if they seem silly. My background is 7 years with an understocked, planted, community tank; so I rarely had water problems. Now, I'm just trying to learn as I go. I might not be of any help but we can share info and try to help each other.
1. How long has the tank been up and going?
2. What size tank?
3. How many and what size is the stock?
4. Do you have any plants?
5. Sounds like you have a canister filter (and something I've never heard of), correct?
6. What type of media is in the canister?
7. What part of the nitrogen cycle is reading high, ammonia, nitrites, or nitrates?
8. Are you using anything as a Buffer (I know it's related to the nitrogen cycle)?