I got a tip from a local about tying the suction cup of the clip to some fishing line, then attach the line to something to hold the clamp. The clamp is free hanging by the line with the nori sheet. The fish love it, as the clip moves in the current, as the nori, it actually seems to stimulate the feeding instinct. I also think the fact that the clip is not suction cupped to the side reduces any fishes leverage on the sheet, which is why I do not need to fold it.
I put a half sheet into the clip, not folded, but fully into the clip, and in about 5 minutes it is history, open the clip, and the remaining piece floats free to a willing diner waiting.
No hands in the tank. I feed one half sheet/day, and normal food.
Cutting it up is probably the best option though as long as you soak it.