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    Q: Automatic fertilizer injector

    Hello, I am setting up new automatic watering system and I want to not only automatically water my plants, but also feed them. The problem is that organic fertilizers dont last very long diluted. So I want to do DIY fertilizer injector. I already have 2 L container of water which fill itself...
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    Cooling question

    Hello, I am setting new grow room and I have very concrete question about cooling. I want to cool four 150W HPS, each one in cooltube. Now the cooling of bulbs will be separated from grow room. The reason why I want to do this, is that I want to add CO2 and use most of it. So the idea is...
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