I have little white things hoping around on the bottom of one of my tanks. I think they might be water fleas, but I am unsure as they seem to be a lot bigger than the examples I have seen in pictures. Plus they are almost always on the bottom of the tank, not swimming around. I attach a screen capture from a video I took of them. I underline them because they kind of look like small pebbles. I also have a 20 second video, hosted on YouTube, that shows their behavior. I should also note that I have guppy fry and juvenile mollies in the tank and they are not eating these critters. I would appreciate someone confirming these are water fleas, or if not, please help identifying them.
Thank you for your time and assistance!
John