Tank was set up 11/07/09 and three days later fish added. We used some products that came with the tank on start up but have only added water conditioner since. Some Gourami died last week and water was tested and the Pet Smart showed ammonia at .5 I have since added twice ammo lock in two day intervals and did a water change day of adding ammo lock. Today being the second day. Tonight I tested and here are the results. Ammonia 0.75 Nitrate 0.00 Nitrite 0.00 PH 7.6 PH High 7.6 For the last four days the filter pump is running but no filters in slots as they have carbon. I will do another water change tomorrow of 10 gallons and retest ammonia later that night. I add water conditioner for the ten gallons every time even when ammo lock. How long can I run no filters? Should I just pull the the carbon out of the bag filters and put them back in. I am not really sure how best to handle this. Fish seem to be doing great and very responsive to us coming in the room and at feeding time (twice a day). Water temp is 78 degrees F Have two live plants in the tank as well.