
I have 3 problems

1, I have some worms, they are not Planaria or Hydra I have about 20 of them I would say, Very long and thin, As they move they have like a red bit that flows through their body, Similar to how a worm in the garden moves and that darker section moves down their body (if that makes sense),
anyone have any idea what these are, I saw my Danio eat one flowing in the water,
when its flowing it wriggles like mad,
2. I have these like minuscule Bugs living on my glass and they almost seem as thought they jump when something goes close to them, to another part of the glass.
like how a flea jumps. (been trying to find what these are) <--- So I have been reading up Loads trying to figure this out and my question is,
My tetra has a lump near its gill , looked like the fish would die but the cyst popped and healed up,
could this have been ich, are these small Bugs Ich? cant ich be seen before they attach to a fish
3. I have snails
But some how I have managed to incur a Scratch on my glass I think its from the inside. is it possibly the cause of me crushing them?
this thing is BANG in the middle and makes me want to buy a new tank.
it's not VERY visible but I know its there now

thanks for any answers.
p.s the bugs are most annoying especially the worms,
My tank is VERY clean I change water every week all ways dechlorinated and my nitrates are 10ppm