HEEEELLPPP!!!!! SO i have tried everything I can possibly think of to try and get my aquarium to stop smelling and it just won't go away. I have the old company "Aquaclear" now fluval filter 40-70 gallons on a 20 long with a bubbler. I do my weekly water changes, there are live plants, I use API Stress Zyme every week and I have a bag of carbon along with a bag of zeocarb and it still smells! The same thing is happening in my Oscar tank. He's in a 20 gallon with a 50 gallon marine land penguin filter and his water smells too! I am getting a canister filter tomorrow for his tank but in his filter currently there is 2 bags of zeocarb along with a back of carbon. ANY SUGGESTIONS!!!???? I'm dying over here!? I've had this problem before but it was never this bad and it went away in like a week. PLEASE HELPPPP!!!!!