Are there any advantages to your siphon drain over bell siphon? Where can I get lava rock in Orange Co.How does it affect PH and I assume it is cost effective. I am using 1/2 hydroton, 1/2 pea gravel to cut the cost. I use the cement mixing bins from HD and only have about 4" of grow medium height, but my plants seems to be doing well. see my videos. thanks in advance.
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