get 2 2L bottles of pop, cut 5" off the base off 1,
cut 2" off the base of the other bottle. leave the cap on and turn this bottle upside down and place inside the base of the fist cut off bottle.
put the small cut off base inverted in the top of the other bottle with a small piece cut off (one of the bumps) to put an airline through. add an airstone. this is the lid. dissolve 2 teaspoons full of seachams marine salt (best) or api aquarium salt, in a little hot water. add 1 litre of cold water, add to bottle with out cap on. add half a tablespoon of BS eggs. put cap on make sure airstone goes in the neck of upturned bottle at the bottom, turn on airpump. place under light. after 24odd hours turn off airpump and check for egg casings floating to surface and brine shrimp swimming to bottom. siphon BBS out into a glass. wait for BBS to swim to bottom and carefully tip water away. fill up glass with cold water and repeat 3 times. this gets the salt out. tip water and BBS into breeding tank
There is something wrong with them now. I good portion of them swim in circles and an hour later there dead. Is there a reason for this? If it's an illness is there a cure?