I'd say there are 250-350-ish swimmers?? It's really hard to tell. Around molting time so far, that's when I lose a whole bunch of them, so I'm betting it's a hard process just like for the adults. Normal daily losses (dead+dying) are around 50, and based on the past two molting episodes, there is a three day period where it looks like I loose (dead+dying) 100+ per day, but it might take them a couple days to die because while they are dying they still follow the light, so they don't get sucked up during water changes.
Lately I've had seemingly "healthy" swimmers NOT follow the light, and it makes me so mad because I have to do bucket checks that take about 15 minutes rescuing healthy babies that got siphoned out. I know my husband won't do that on his own. I keep telling him, "they could be the next Godzilla!"
I'm going to make the sandbox ramp today I think. The sun came out today, but they were supposed to pave the apt parking lots, so I didn't want to do it today. Turns out the pavers never showed up (the manager was very angry), so I am going to go for it after their water change.
I think I am also going to start hatching my brine shrimp outside the tank. The water just started to smell too funky during water changes, so I decided the less organics I put in there, the better. It's just more of a hassle hatching them externally because I don't have an air pump to spare (adult crabs will be without a bubbly fresh water pool for a while), and I am very clumsy when it comes to open containers of water sitting out! I spill them every time!