Thanks for helping me out. I do use a chlorine primer for every water change, and even add the water back slowly so as not to drastically change the water chemistry. I also did wait a few weeks before adding fish, actually more like a month, and when I did add them it was no more than 3 at a time. In fact there's only 10 neons, two quarter sized angels, 4 ottos, and a handful of cherry shrimp, so not even that large of a bioload. I'm positive the tank was cycled prior to the additions.
Do you think that pH fluctuation could be a culprit? I have pressurized co2 with a regulator from GLA, but it doesn't have a pH regulator on it. It shuts off a half hour before the lights go dark, likewise turning on a half hour before the lights go on. It's running at about 3-4 bubbles per second, and my drop checker is still dark green.
What do you think,