Hi Matt,
Sorry to hear about your troubles.
I don't remember if you use one, but have you thought about a UV sterilizer? A lot of people with delicate fish use them. Copps is the top hobbyist that comes to mind.
Hey Ed,
Good to hear from you. I don't use a UV sterilizer. I don't think any of my issues were from disease related, except for the pyramid perhaps.
If I was going to use anything, I think it would be an ozone generator, but they've always made me nervous and I figure I can circumvent the need by having a rigid quarantine protocol.
I have a feeling the blueline is behind the tank. I'm a moron and still don't have a lid. At least I know I'm a moron. Or wait, does that make it worse.
Hope your tank is well.