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Shrimps and Crayfish don't suffer from Ich. This looks like parasitic Scutariella. You can read about it in this post along with possible treatments.

Oh, I use the divider with the sole intention of hatching fry and making sure they can evade their parents. I have growout tanks that I use to seperate males and females.

thanks crabby for all your feed back : ) i know about the subdivider options but have been stung by it; i thought it would keep fry separate so i spent a whole afternoon separating girls and boys into left and right only to come outside after dinner and find that they could get from one side to another and they were all mixed up again. x( thought that was worth telling you since you're trying to line breed. you may not be able to tell but the two different groups are almost definitely mixing in the fry saver. sorry to be the bearer of bad news... that is a kink i would like to work out in my design though

Congrats and well done on hatching your shrimp artificially.

I use a few different breeder boxes, and while none of them are perfect, they seem to do the job for me. I don't have any idea what models or brands they are, besides one - the Aqua One Mini Float. I bought it for endlers and shrimp, and I doubt it would work for guppies, mollies or any other larger livebearers, since it is (as the name would suggest) pretty small. It's hard plastic, which I like (for usability), the suction cups kind-of suck, although it does have two compartments on either side that hold air, so it won't sink if the suction cups come off. It's a great size for my 5 gallon tank. My problem is that the gaps are too large for shrimplets. I think there should be some alternative option that has a very fine mesh (like in a shrimp net) that can be attached over the areas that have water-flow holes. It also comes with a removable divider for fry seperation. I do prefer breeder boxes with a divider option. I also have 2 of those rather common large mesh ones, that pack really small and have a net that goes over the hollow-cube structure. One has 2 dividers (so you can subdivide it into 2, and have a baby-catcher underneath still) which I found very useful when I was breeding lines with 1-2 males and 2 females, as the females would drop their fry around the same time. So I think the metacube idea is a really good one. There are a couple reasons I prefer hard plastic (with a fine mesh attachment possibly) over mesh with plastic scaffolding (like this) - firstly, the plastic ones are easier to move when you remove the fry. I have on multiple occasions accidentally left a fry in the mesh one without realising. Luckily I noticed in time, and I haven't had any deaths from that. Secondly, there are slight gaps between the mesh and the scaffolding, and the fry have a tendency to get stuck in those gaps. If I don't notice, there's a fair chance I could lose some of those fry. I also have problems with the mesh ones getting algae on them. If the hard plastic gets algae, I can easily rub/scrape it off. The mesh just does not let go of algae though, and it can be a bit of an eyesore (in addition to how ugly the mesh ones already look). If I try to suck it off with a syphon (just cuz) the fry get sucked into the net and stuck. I hope that's helpful. I do realise it's a massive mess of text. To sum it up, the things that are important to me as a shrimp, endler and guppy breeder are the following: Clear, hard plastic box Divider option Safe for baby shrimp Has a possibility to use multiple beside eachother - possibly interlock GOOD suction cups (like Eheim ones) Smaller size Works with and without a lid No places for fry to get stuck. Cheers, Crabby.