Just a few minutes ago it was uploaded in the channel Fish Keeping Jamaica, another video “How to make pond or Aquarium water hard?”.
As pubished in the youtube page by Fish Keeping Jamaica: “This video shows seeks to inform you on how you can get your pond or aquarium water hard. This video is a follow up on a video previously done on managing water hardness. It is hoped that this video will give you a greater insight into the issue.”
You can check the video below: