RyanB your pictures show something that looks like pollen, and a bit of floating algea.
Gravinus, your photos show what I would think is blue-green algea and not all BGA is blue or green, some can be red too!

BGA is easy to control with a light dosage of 0.1mg/l (0.1ppm) of copper in the water for most species of BGA.

Pollen is difficult to remove without breaking surface tension, but it is not dangerous.


Mario Paris,
Fish & Wildlife Management Technician, CEO of Canadianponds.ca Products