I set up an aquarium yesterday and have had it running for about 19 hours now. Have a Pleco, two blue Gouramis, and a catfish in the tank. The Pleco and catfish I put in there yesterday about two hours after running it, and the Gouramis I put in about three hours ago. They all look great, they're all eating. They all look healthy and happy. When I had it running yesterday I put all of the ornaments from the old tank into the new, not washing them, so I could keep the bacteria on them. And I put in the filter floss from the old aquarium into the new with the new aquarium media in there, so it would have a good jump start. I just checked my water parameters and my ammonia was about .1 and everything else was 0. The pH was normal. Did it cycle that fast? Or is it just begining to cycle? I figured with the fish in there the ammonia would ne up and everything? Did having all of that older stuff in there from a cycled tank maybe let it skip it?