I am so sorry you experienced this outbreak. As a complete beginner, that hasn't yet set up their first fish tank I did want to make sure I take the time to thank you for sharing your experience with the forum. (me) I have written down your experience and diligent actions toward the situation and printed it out. Undoubtedly, this will prove a valuable resource if I end up in the same situation, and I am sure it has helped others as well. So thank you!
I don't want to sidetrack this thread too much from the beautiful pictures, but it might be beneficial to include how you prepare new plants and fish when adding to your tank (ie the normal process and the steps you skipped). I know there are numerous resources that provide information on the process of adding new fish/plants, but it could be helpful to have it all in one thread. You could see the direct cause and effect in your journal. Just a thought, to continue to turn this negative situation into positive information for new learners like myself!
Anyways, thanks for the interesting posts!