whats going on liquid sun, i noticed no one replied to your question about ec and ppm and i figured id try to help out. ec is a measure of electrical conductivity. basically distilled water does not conduct electricity or boil for that matter, it needs something like salts, not NaCl though like table salt, in this case your nutrient solutions. your EC meter will send an electric current through the water and based on its calibration (usually us 1413 or ms 1.413 ) will calculate the electric conductivity of the solution the meter is currently in.
With that being said calculating between ms, us, and ppm is unbelievably easy which is probably why no one cared to comment, not to mention you dont seem to be in any need of real assistance your plants seem to happy as a dyke in a hardware store (George Carlin). The u in us, which is actually represented by the greek letter μ can be easily converted to ms by multiplying it by 1000, or moving the decimal place over to the left 3 times. so in the example above 1413 us is 1.413 ms. This is specifically electric conductivity, not that you cannot extrapolate the ppm from the ec.
if you have a us of 1413 for example and was wondering what the ppm was, you would simply divide it by 2 or multiply it by .5 (or half). therefore the 1413 solution would have a ppm of 706.5.
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if your EC is to high all you have to do is add water, if that doesnt work remove solution and add water.
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as for your nutrient solution, i use the AN ph perfect and from what ive read, it kinda blows because of the buffers dissolved in the solution, meaning it might have a higher EC not because of its nutrient concentration, but because it has other additives to adjust the PH. but none the less for seedlings before they have 3 sets of leaves i usually only let the ec get up 600 us or .6 ms after they have 3 sets i let it chill around 800 us or .8 ms, once they have 5 sets or more i usually increase it to 1.2 ms or 1200 us. from what ive heard from many growers and from what ive read about 1.4 ms is the highest you can push a plant, i like it being around 1.2 because if i decide to go out that night and dont come home, i dont have to worry to much about the EC getting to high, this is because i have a small little DWC that only holds about 10 liters in the beginning of a grow (it decreases due to fat roots and shit).
for your feeding schedule when in doubt LESS IS MORE!!!!! i cant stress that enough, if your bitch is hungry, she'll let you know.
also i verified all my info from this site
http://www.420magazine.com/forums/how-grow-marijuana/71813-what-difference-between-ppm-ec.html
hope I helped you out if you didnt figure it out on your own, which based on your plant you seem to be on your way bro :smoke:
-Sherlock :eye: