I have a hydro drip feed growbox that I have used successfully twice with heat being the only problem. By the way, the heat problem was due to vents that were crushed closed when the box was shipped. I am now in the 3rd week of a new grow, water changed 3 times, and have fuzzy looking scum in the water, it looks grey in the water, green if I grab a sample. The plants themselves look fine but this stuff seems to be growing faster by the minute. To be clear, after the last grow I made certain to clean the reservoir, tubing, etc with a water / bleach solution to avoid any such problems.
Note that the PH has stayed solid 6.00 to 6.14 for the entire 3 weeks of this grow.
Any ideas as to what this stuff is? Any ideas on how to control or rid myself of this stuff?
Thanks in advance.