Lets talk about my dead fishes :(

[digital-audiophile]

Perhaps and aggresive fish chased the goby out of the water? As for your fish stuck to the powerhead I had that happen in the past with a CBB, I suspect that he was starting to fail in health and just ended up getting to close to the powerhead and did not have the strength to move himself off.

Sorry for your losses It is always a horrible feeling to lose fish when everyhting seems to be going good.