It would be very hard to kill triops from lack of oxygen. ... Even at very low oxygen levels, triops can survive for extended periods by swimming upside down at the water surface where oxygen levels are highest (they do this looking for food as well, the behavior is not necessarily indicative of low oxygen levels).

Are triops cannibals?

Only use a dozen or so eggs. Triops are cannibals, and you'll only end up with two or three by the time they're full grown anyway.

Can you overfeed triops?

For the 2nd feeding, crush 8 to 10 pellets and sprinkle them into the tank. Do this only once throughout the day. Be careful not to overfeed the Triops.