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thats very kind, thank you. By the way I think I found exactly what I need: http://en.wikipedia.org/wiki/Linear_motor

Yeah I looked that up and nothing, except expensive systems for hundreds of bucks came up. Thanks for advice though. I need to do it by myself, only thing that is missing is that device which moves under electric current, very slowly and only by fractions of inch.

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...

okay thanks

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...