I think my eldest female betta has a tumor on her side, which seems to be altering her swimming performance and changing her actions. I feel really bad for her, she struggles to swim correctly, and it takes her a lot of effort to get up to the surface for eating or breathing. What can I do to make it easier on her? I thought about lowering the water level, but moving her to another container with a different filter. Its easier for me that way, and then I’ll have an open tank for a rescue betta that I am getting soon. Should I lower the water? Here is a photo of her today.