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    Micro/trace source for DIY salt mix

    I'm looking for a source for micro nutrients/trace minerals to add to my base salt mix. For anyone curious, the recipe is below (for a 100x concentrate, per gallon): B - Magnesium Sulfate (Heptahydrate) MgSO4.7H2O 191.958g A - Yara Calcium Nitrate Yara_Ca(NO3)2 265.287g A -...
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    Electrical question: DC power to my fan

    I have a 12VDC Comair Rotron Major (235cfm) (http://skycraftsurplus.com/index.asp?PageAction=VIEWPROD&ProdID=1353) with terminal connectors. The specs are 12V 2.26A. My question is, how can I power this thing? I've looked at thrift stores and Wally world and the best I can find is 12V 1.3A. I...
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    Light schedule switch

    Would you anticipate problems when switching from 24/0 to 20/4 during the veg cycle? Would this one-time switch stress the plants?
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    CFL research: most efficient CFLs per dollar and watt

    In doing some reaseach on 1000bulbs.com, I made an Excel spreadsheet to calculate some simple stats; lumens per watt and lumens per dollar of some popular CFLs in the daylight range. Where 6400-6500K bulbs were not available, 5000K were used. I included the higher watt bulbs initially, but I...
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