Of my three LDA105's, I lost two of them today within hours of each other. Both looked healthy with no apparent signs of distress or illness. I had fed them zucchini last night which was purchased from a different grocery store - I rinsed it before feeding it to them though. That has been the only thing to have changed recently otherwise status quo. Nitrate level is higher than I'd like but I'm due for a tank change.
GH ppm 180
KH ppm 40
Temp: 85 degrees Fahrenheit
My three blue phantoms and a couple of zebra plecos in the tank all seem content. Any thoughts?