Ok so I have a 20 gallon tank for now and a Fluval 404 (for 100 gallon tank size) I have tried everything without any success to have the water look and smell ok. I change it and after couple of days it becomes cloudy and starts smelling really bad. My filter works, I have tried water treatments, AND I do change media in the filter. So Any suggestions from anyone on how to remedy this? Any suggestions on how the media should be stacked (what order)??? Any answers are extremely appreciated.
Zoryana