I've been asking for help with this tank for quite a while but I'm not getting much feedback. I have a 4 month old 16 gallon tank. It is Fluval Vista Kit that came with an AC 30 HOB. That filter immediately began acting up. The water was filling up to the top and at times overflowing...and the tank wasn't clear for long. I decided to try the newer Sechem Tidal 55 HOB. Kind of had the same issues.... only worse! I know filters are supposed to be kind of dirty. I've had tanks for 5 years and have never really had issues with filters. The Tidal was constantly filthy and smelled like a swamp, making my whole tank smell. The water would cloud up suddenly and plants and fish died. I got fed up with the Tidal after a fish death tonight and went back to the AC 30. It's already filled to capacity with water and threatening to overflow and it's taking forever to clear the tank. I've totally had it with both these filters. Can anyone suggest something better??? I do not like filters with cartridges. I'm looking at a cheap canister filter option but have absolutely ZERO experience with them. A 4 month old tank that's getting huge weekly water changes (recently) should not be this dirty or smell bad. I don't know why my fish and plants are dying. Please help if you can.