Hi! I'm a science teacher that has taken on another teacher's discarded Betta.
Backstory: The fish were originally given as gifts years ago, in vases with various plants for filtration. At the start of the shutdown, all of the fish were moved to my class because I had sinks and tables. Fast forward 14 months and only 4 are still alive. I have found homes with students for 3/4. The fourth looks very sickly and so I'm trying to bring him back to his former glory myself (to avoid traumatizing a student). With a little Googling and PetSmart advice, I am trying to prepare a 5 gallon tank for my Betta.
I need serious help and guidance. Where do I even start?
Pictures include new tank, close up from 5 months ago, close up today with plant moved to new tank.