As a soil scientist applying microbial bacterial technology to the marine environment Prawnmaster used old shrimp feed bags (polyethylene) in test shrimp nurseries (pre-criaderos) in Granmar, Ecuador 1984.

Also to emulate Algal Mats in shrimp hatcheries – as a way to increase surface area and biofilms for shrimp grazing.

Vannamei shrimp also grazing biofilms as a useful vitamins and supporting nutrition possibility – at least under SPR technologies – French as opposed to US SPF.

https://www.chemistryworld.com/news/bacterium-may-help-answer-mystery-of-missing-plastic-in-the-seas/4016904.article