The 150 Gallon acryllic tank is now home to 31 assorted Koi and one fairly large algae eater. All of the fish are happy as they have shifted from one meal per day to 2 or 3. The additional meals are courtesy of the nitrifying bacteria that has finally taken hold. This is the quickest we have had a tank complete the nitrification cycle. It has taken approximately 5 weeks of almost daily water changes and the addition of live bacteria starter. I am crediting the rapid cycle to the consistent flow of the Fluval FX5 canister filter and the addition of bacteria. Needless to say, the fish are certainly happy!