However, one of my newest additions has recently, (beginning about two-three days ago), become quite sluggish and was using a plant to "hold himself up", which I thought was perfectly normal, as I know Weather Loaches have awkward sleeping positions, and my others like to perch in plants as well.
When I returned home from school this afternoon, I went to feed the fish, and when one Weather Loach did not show up for role call, I began to look around for him until I noticed his head poking out from his favourite little hiding cave. He was upside down, and I had pretty much reached the conclusion that he had died. I reached in to remove him from the aquarium, when all of a sudden, he took off (although not as speedy as usual). Since then he has barely been moving, and as of the last time I checked, he is laying on his side.

I have never heard of any "common diseases' that Weather Loaches may carry... and all of mine have been extremely healthy up until the time when this little guy began acting this way. Thier water is kept pristine at all times, so I can't see that being the issue...
If anyone has any ideas as to what may be wrong with my little buddy I would greatly appreciate any help you could give me. As absurd as this may sound, my loaches are actually a big part of my life and it breaks my hear to see one of my little buddies suffering this way.