HOT Magnum Canister Filters The PRO edition HOT Magnum complete with all the features of the standard HOT Magnum, Siphon Kleen Gravel Washer and connection kit, plus a Bio-Wheel Pro Wet/Dry filter. HOT (Hang On Tank) Magnum is an efficient, powerful, compact canister filter that is lightweight enough to hang directly on the back of your aquarium. Because it is a Magnum, it comes feature-packed with the ability to convert with ease from a continuous duty mechanical and chemical utility filter to a water polishing filter with micron filtration capability. Comes complete with a Carbon/Media Container and Water Polishing Micron Cartridge.