A few weeks ago I setup a 20 gallon Rubbermaid bin on my deck to breed trapdoor snails for my darters. Up until today it's just been a few snails and their babies, tons of algae, and anacharis in the bin. Well I go outside to look a few minutes ago and there's these disturbing looking tiny worm things with spines on their sides and one eye jerking around on the bottom and in the water column. I have no idea whatsoever what they are but I'd like to know what they are before I stick my arm in there for another water change.