Triassic Triops kits are the best. Buy the deluxe kit on amazon. I got about 40-50 hatchlings in one bag of sand using the Spring water by Zepphryhills to do the work. You can trust Triassic Triops since they only raise Triops and will provide full replacement if not working. The kit comes with the food also so you don't need to worry about the food.

Here is the link to the kit! https://www.amazon.com/TRIASSIC-TRIOPS-Instructions-Prehistoric-Educational/dp/B0948MVGHH/ref=sr\_1\_2?crid=1D95AW71QHU34&keywords=triassic+triops&qid=1681841265&sprefix=triassic+triop%2Caps%2C103&sr=8-2