What is this?

[pcdebb]

I've had these white little worm thingies in this tank for a while. I can't seem to get rid of them. I've water changed, which includes gravel vac. It doesn't seem to harm the three angelfish that are in the tank, which have been in there since they were tiny angels. When i do a water change, the water is clear, but it gets back to where I can literally see them floating around in the water.

Any ideas?

White floating things - YouTube

 

[Ricky 1]

Looks like Planaria. they thrive on uneaten food in the gravel, you need to vacuum the gravel and do water changes, your fish should be ok.. see what others think..........

 

[pcdebb]

I suspect mom is overfeeding, which she swears she is not doing. The 75 gallon had the problem but no longer does. I will step up the regimen and see how it goes.