Question about algae and growing medium
First, thanks for the excellent site and information.
I'm a long time greenhouse gardener but this year will be my first time trying hydroponics. I decided on the ebb and flow since it seems the least expensive and easiest.
I'm going to use a 2'x4'x6" tray containing 8 - 3 gal containers.
A few sites warned about algae growing in the nutrients. Has that ever been a problem for you? Should I cover the tray around the containers to block the sunlight?
Second, you mentioned pea gravel. I'd like to use that because all the other mediums are very expensive. The gravel is available locally but the other mediums cost over a hundred dollars with shipping. Since the medium will be in individual 3 gallon containers, weight isn't a problem.
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