The MegaVeggieMag is a staple way to feed nori. It is more convenient than a clip as it uses a magnet as opposed to a suction cup. It has a stronger magnet than the VeggieMag for better hold.
The magnet allows you to use it where your glass isn't as clean and where there may be Coralline algae.
If you're feeding multiple times a day the Two Little Fishies VeggieMag, MegaVeggieMag or SeaVeggies Clips are recommended.