The Bubble Magus QQ1 was released in 2015. Its new structure offers another position to hang on. While the older NAC QQ's were placed fully inside the aquarium, the new QQ1 now sits on the rear wall (up to 12mm thickness) of the aquarium - Just like hang-on filters. The QQ1's pump (Rock SP-600) is able to introduce big amount of bubbles into the water stream inside the skimmer body and pulls out unwanted compounds right out of the water, then puts them into the collection cup - easily and efficiently.QQ1 skimmers, along with their powerful pump, are merely designed for Nano tanks - up to 100 Liter in volume.