amano shrimp dead in less than an hour
I have a well planted tank with pressurized co2 and EI fertilization. I have the co2 cranked up really high to combat BBA, but it's also well oxygenated and my fish are all doing fine. I've been more liberal with adding EI ferts because whenever I test the water my nitrates and ammonia are near zero. Inline heater keeps the tank around 80F. I've always had trouble certain species, for example, I've tried shrimp several times and I can't keep them alive. Same with otos, and I unfortunately killed a group of Dario Dario earlier this winter. Not sure what is going on, because my harlequins, CPDs, and pygmy cories are all doing fine. I'll add these new species, they'll all drop dead in less than a week, and a water test reveals no irregularities.
After giving up for a few months, I decided to try Amanos once more. I put 5 in the tank, and was shocked when all were dead in less than an hour, some in minutes.
My understanding was that organics from Ferts wouldn't kill livestock, and I'd be surprised if I was using ferts in quantities that could kill.
I keep being told that if I have BBA, to raise my co2. I have killed livestock in the past by having co2 up this high and filling the water above the filter outlet, reducing aeration. I added a spraybar to prevent this. However, I think my co2 is way overkill considering I've had to reduce light to 5 hours per day to stop algea growth. I suspect my co2 is so high that maybe new livestock can't adjust?
I suspect my algea problem is a combination of high organics (dead plant matter in the substrate from black outs, excel treatments, etc to kill algea), and the actinics in my LED light.
The species specific die-offs, I have no idea.