FishRookie

Thank you so much @Guppysnail and @AllFishNoBrakes! We tried doing some water changes to bring down the ammonia levels and the brine shrimp managed to survive the weekend! They are starting to actually get a little bit larger in size compared to when they first hatched, so this has been exciting for the students. We have continued to feed a little bit of yeast each day and that seems to be going okay so far. If we can keep them alive till winter break, any suggestions for how to manage two weeks where no one will be in the classroom to change the water? Would it be helpful to use the Fritz TurboStart on the last day we are at school, do a good water change, and hope for the best? I have appreciated the tips so much! This is the farthest we've gotten in our brine shrimp hatching adventure so far!

Thanks for the resource link and suggestions! So far we have just been topping it up once the water evaporated a bit. We don’t have a tool to measure ammonia unfortunately, but will definitely try doing a water change to see if that helps! Would you suggest shining a light near the bottom, scooping out some water from the top and then adding the replacement water? Is there a better way to do this? My guess is that there’s probably a lot of dead shrimp in the tank too near the bottom.

My students are trying to grow brine shrimp to adulthood in our classroom, but we've been having a lot of difficulty keeping them alive after hatching. We are using a 1.7 L tank with tap water that has been conditioned. The salinity is around 36-37 ppt measured with a hydrometer. We have a heater set at 77 degrees F. We have a small air stone running (we've tried running it periodically throughout the day for short spurts, running it all day but not overnight, running it all day and night). During the day we have a plant light overhead but this is turned off at the end of the school day. The tank has an opaque lid so there's not actually that much direct light (we mostly use it to make it easier to observe the shrimp and also for our actual plants next to the tank). The eggs are in good condition and not expired. Our best run so far is: Eggs hatching on Tuesday, alive and thriving on Friday, but most dead by Monday after the weekend. We've been trying to feed it some baker's yeast (first mixed with conditioned water in separate container till cloudy, then pipetted into the brine shrimp tank). Basically we've been trying different things and none seems to be working very well. Help and suggestions?