Ok, you're going to have to restart your cycle. Sorry, but that tetra really wrecked the biology of the whole system. First, drain all the water out of the tank. Second, fill the tank with 500 gallons of ammonia. Third, toss the filter you were using into the ammonia. Now the benificial bacteria has enough food to start cycling properly. In approx three years, it should have converted 99.99 percent of the ammonia into water. When that happens, you'll need the tetra back, so keep it in the freezer untill then.
:laugh: that actually made me laugh out loud! :headshake2: :lol: that is just to much!
