I had my second attempt hatch last night (about half the eggs, going to keep bubbling the pot to see if the rest hatch).
There are three main differences I tried this time.
First - Used a black plastic round tub instead of the rubber one.
Second - Waited for fish to hatch before adding greenwater/rotifers
Third - Used mostly nanno in my green water instead of tetraselmsis (my nanno crashed before my first attempt, just now getting it back online).
At first, the results seemed to be more promissing, the fish were better able to control themselves and say in the same spot.
But as the hours when by, I saw more fish floating or on the bottom (I'm assuming all dead) and none in the column.
Two questions I have that may or may not have caused the deaths - First, should I not be shinning a bright flashlight into the water to try to find them? Can this stun/kill them? Second, I have two white plastic pieces glued to the bottom of the black round tub. Can this disorient them? And finally, if they hatch and live for a while, does that mean that the salt water salt content is alright? I use freshly made (aged) salt water and it doesn't match all the breeding tank parameters.