What is growing in my tank? Pics added

[tim the toolman]

i agree that this is what is in my tank but can find no reference anywhere to show this is a sign of overfeeding. I also am seeing some instances of copperbands eating them. Has anyone had any success in removing them from their system. I only feed 2x a day and the food is consumed in about 10- 15 seconds with alomost none settling.