All three Sea-Monkey kits succeeded in harvesting active adults by week 6 as shown in this video. However, there was only one adult in two of the aquariums the first week. More naupliar hatched and grew in the later weeks. In contrast, the 3 DIY jars failed to grow any brine shrimp to adulthood. I have changed my attitude about spending an extra $6 for the kit with a little plastic aquarium. The kit aquariums worked well, had a small footprint, fit on book selves or windowsills, contained magnifying lenses, and provided a broad side for watching. I found that one small level scoop of food weekly kept the Sea-Monkeys alive without leaving excess waste. Once there was more that 5 adults in the aquarium, I change to feeding rate to one scoop both Wednesdays and Saturdays. Finally, each Saturday add distilled water to bring the water level back up to the makers.