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Hey, i am new to hydro but i read some material and watched some videos and came up with my own ebb n flow system for my wardrobe grow thing.... i purchased some xxx-420% seeds from the Ontario's Best seed bank and started them in rockwool and now they are in clay pellets and are ambitious to...

i have recently started growing hydro with an ebb 'n flow system! i finally got some hydroton (expanded clay pellets) to bury the plants in rockwool. but ever since i added some ferts to the water, a green algae or fungus looking layer has appeared on the top of the rockwool. should i cut this...