Aquarium Forum A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en New to the forum from st.albert alberta ! <script language='JavaScript' type='text/javascript'> <!-- --> </script> I have two 40 gallon tanks First tank 5 black skirt tetras 5 sword tail Molly's 2 catfish 5 red eyed tetras Second 15 neon tetras 2 rubber plecos! In the first tank I just have a question for you guys ! I have a bubbler 75 gallon filter Well established had it for about 4 months The problem is that I been having a more than noticeable odour coming from the tank not fishy but notable. I had the water tested and the girl at big ALs aquarium said my water was perfect ! I wonder what could be causing this . Is it normal ? I feed these little guys once a day I do a 25 percent water change every Sunday followed with a vacume to clean the gravel . Am I doing This right ? Any input would be strongly appreciated Thank you ! Cheers Millartime09 2014-09-19