Black Mold in Your Water Bottle: How to Spot & Remove it - Ultra Fresh
https://www.ultra-fresh.com/black-mold-in-water-bottleHelp/advice with Waterbrick Storage issues (mold)
https://www.reddit.com/r/preppers/comments/fcz7ug/helpadvice_with_waterbrick_storage_issues_mold/Mold in Water Bottle: Symptoms, Dangers, and How to Prevent It [2023]
https://waatr.com/blogs/portable-water-purifier-blog/mold-in-water-bottleWater storage issues–water bricks contaminated after 1 year – The Prepared
https://theprepared.com/forum/thread/water-storage-issues-water-bricks-contaminated-after-1-year/