So - in an effort to hold down costs ( a bottle for tigger pods) and NOT have my mandarin goby starve to death, I started up a brine shrimp hatchery - which has been a huge success - the corals love 'em, as does the royal gramma (or "the queen mum" as we like to call her... get it?), and the goby is hungrily eating SOMETHING after I put the brine in the tank (although as we all know, sea monkeys are pretty damn small...) ANYWAY - how long will the hatched brine last in the jar before it's time to start over?