Harmonus has been doing beautifully. The edges of his fins are clear now with new fin growth. I've been doing the proper water changes, along with adding aquarium salt each time. I've been keeping any lights on in the room rather dim, and I have closed the blinds to my window to help keep the natural light out. I have not turned on the hood light [over the tank where Caldus is kept] except for at feeding time/water change time/salt time.
BUT [and there's always a but]
I put his bowl back up where my other tank is, and near it, not next to it, 2 days ago. I checked on him today [day 3] and there's a small square-shaped chunk missing out of his fin again. For those of you who feed your fish Betta Pellets, it's approximately the size between 4-6 pellets laying horizontally, in rows of 2.
What else can I do for my boy? D: