The ORCA Aquarium Bag that is listed here is made out of fabric that is non toxic and can be used for your aquarium.
We personally use these bags within the shop and fill it up with Coral Pieces to Buffer our pH.
We also use these bags with Carbon to help polish the water.
Another application is to put Susswassertang into the bags and let it grow emersed.
Whatever your application it is a good way to keep the small pieces of your tank together.
Comes in two sizes:
Small – 6″ x 9″
Medium – 12″ x 10″