Dsoz,
If u want some for u home tank
U can drop in apiece of 1/2" pvc pipe...maybe 6-8" long or so by some calerpa in ur school tank..
And they will take up residence in there shortly.
Then reach in and cap of both ends with hand when u bring up the pipe horizontally...
That's what I do when I need to collect some mysis
But I bet u have some in ur home tank already...just don't know it ...check at nite with a flashlight
HTH