| Buy the original ink tank and you'll won't be sorry. Some of the refill kits or the generic ones can clog. Not worth a few dollars of problems and costly repairs. The two packs are better deals. I make only infrequent use of my Canon Multipass printer, sometimes letting it stand idle for several weeks. For whatever reason, the black ink tanks clog the printhead after prolonged disuse whereas the color ones keep functioning. Although more likely to happen with a clone, the same has occurred with Canon originals. Before throwing out the printer (and I've come close), run it through the cleaning cycle at least 5 successive times and try printing again. If it's still not working right, do another 5 cleaning cycles. So far, that's done the trick for me, but if 10 times doesn't produce the desired result, you'll need to do some invasive surgery on the printhead itself. As for using cartridges from clone manufacturers, my experience has been that they often require far more "priming" than the original manufacturer's product. As a result, you're wasting ink and saving less money than you may have thought. Also, when ordering Canon ink supplies, beware the manufacturer's confusing and inconsistent use of the terms "ink cartridge" and "ink tank." It's led to my receiving the wrong item on more than one occasion. I use alot of ink cartridges. These are small and need to be replaced often. They're packaged well so you can replace the cartridge easily without getting ink all over you. | 
