I have a 55 gallon tank. I have a fluval 404 filter. I don't know what to do with it. So,
1. What 'media' should I be using when I change it?
2. How often do I change the media?
3. Is 1 404 filter enough?
4. The guy I got it from had a pump on the intake valve to 'help' the water along. is that right?
5. Also, the tank kinda stinks (did when I got it from him). I assume it hasn't been cleaned real good (the water looks clear but who knows?) So, what can I use to clean the tank?
6. I read about vinegar somewhere. Is that okay?
Thanks.


