So what we're basically saying is that we could really use the following information to help you with your situation.
1. Tank size
2. Fish kept in it, and their approximate size, (species if you can)
3. Water parameters (Ammonia, Nitrate, Nitrite, pH, temp, etc)
4. Frequency of water changes and amount you change
5. Where the tank is located.
6. How long it's been running.
7. Live plants or not?
I know you've answered some of these questions already, but we really want to help you, so if you could be as specific as possible, it will help us try to come up with a solution for your situation. We want you to be successful with this hobby, and I personally want to warmly welcome you to this board, though I wish it were under better circumstances.
Take care