Pharma Geddon
Member
clear = algea?
More than likely but I wouldn't sweat it too much. I'm using Fytocell now and the algae loves it, gets a carpet of green on top before they've gone into 12/12. Once the canopy gets dense it subsides.
When I've looked at the Fytocell after harvest, the dark layer from the algae on top is about an eighth to a quarter of an inch thick. At the bottom of the 11 litre pots, where the cutouts are, has about a half inch of light brown. Each darkened corner being about the size of 2 oxo cubes.
The rest of the Fytocell is pearly white and just about full of roots.