So I set up a new 10 gal tank. After it had cycled, I caught what I could of my cherry shrimp colony in the big tank and moved it to this tank (about 10 shrimps). That night, I can only find 2 shrimps.
Week or so later, I decide to clean the filter. Find all my missing shrimps in the bottom of the filter. Its a 10 gal tank, I am running an Aquaclear 30, and I have a filter-max sponge on the intake. How did they get in there?? I do have plants in the top of the HOB, but that filter is stuffed with so much media, I cannot believe they crawled through all of it to get to the bottom. If it were only one shrimp, I might just write it off... but this was about 8 of them in there.
It was kinda disappointing, really... I did all this work to set up a nice fish-free tank for them, and they decide to go live in the filter!