I have a 75 gal. with blood parrots and clown loaches. I clean up the tank in a weekly basis. I've noticed little worms in the gravle when I changed the water but today they've multiplied. I fed the fish worms before but these ones don't look like the black worms I fed him. I don't know what to do. I need help!!!!! Picture of the worms and the full tank attached.





