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if the ambient air is 70 degrees and 10" under the light is say 85-91 degrees using co2 is air circulation still needed. does a fan need to blow on the plants to bring temps down to 80-85? is 90-92 degrees and co2 and convection alone ideal or should a fan be blowing on the plants to bring the...

if the ambient air is 70 degrees and 10" under the light is say 85-91 degrees using co2 is air circulation still needed. does a fan need to blow on the plants to bring temps down to 80-85? is 90-92 degrees and co2 and convection alone idea or should a fan be blowing on the plants to bring the...

anyone have any ideas...?? using a generator and maintainging co2 at 1500ppm, how much would the o2 actually lower from 21%? idk if im getting this but i think it takes 5o2 to get 3co2.. so to lower o2 to 19% would take 12000ppm??? that cant be right? bugs die from only a 2%drop in...

ever heard of dry heat in the winter. homes can be much MUCH MUCH drier than outside. plants would stuggle but wouldnt absolutly die.

im on my second miwaukee ph tester. the next one i get i think will be different. it needs to be calibrated every week at the least, i just dont trust it. I keep it in storage solution and rinse it off every time after i use it with well water that has 40ppm. the first one i had i stored in...

ppm meters go by different formulas so you really need to know the formula of the meter you have and than do the math so you know the true EC. IMO its freakin bs that the companies do this. My meter is 500*1 and others i think are around 750*1...... when my tds (ppm) meter needs to be replaced i...