It looks like a LOT of activity for them to be pods to me.
After a second look it looks like they have eyes?
Looks more like some kind of fry as stated above.
Get some rotifers to feed them and catch a few and grow them up and see what they are:)
Like goma (Greg) mentioned, an Aqua Lifter pump IMO is the way to go. In fact it's what I use. I even have that go to a RODI float valve that I added to my sump as a fail safe.
This way you can us a 1/4" tubing that enters above the water line in the Brute that goes to the bottom and never...