Worms? Planaria?

[somecallmedaniel16]

Hello all!

So I have these small worm-like creatures that climb on my aquarium walls. they are less than 1 cm long, and they usually only climb around when the lights are off, except for a few when the lights are back on. Also, there are these tiny (as in you-can-barely-see-them) specks that I assume are bugs or larvae that swim around in short bursts. Any idea what these things are, where they came from, if they're harmful, and how I can get rid of them? Thanks in advance!