I'm in the process of getting our "pond" back to a pool. I had noticed those dreaded backswimmers, but taking a real close look at the water, I found these guys. No idea what they are, but they're teeny tiny up to about this size here. Super gross looking and they twist and twirl around real quick like little weird worms. Almost looks like they could be some kind of evasive parasite you don't want to get into the water with! Any ideas what they are and if they'll die once I get the pool clean and clear and algae free again??