I feed some Salty's Seaweed Salad from San Francisco Bay Brand. http://www.sfbb.com/Seaweed-Salad™-Green_46.php
They are Seaweed sheets that looks EXACTLY like a Nori sheet used in Sushi
I figure the Shrimp & maybe the SAE would like it. To my surprise everyone in the tank went crazy for it. I cut a 1/2" strip and used a paper clip to hold it down.
At one point the SAE laid on top of it to try to keep the Cherry barbs away. The goby came in from behind and two cherry shrimp waited below. One of the better food buys I've made.
The package says 4 - 7.4x8.2" sheets cut to 16- 3.7x4.1" sheets. I doubt there is any thing different than Nori sheets. There is no listing of Sodium level on the package. One thing I've learned shopping at the Asian market is the Sodium content (I have to watch) is all over the place in processed Asian foods.