@EvilScotsman
I've scoured this site, Soaking up as much information as my thc soaked brain could handle, And picking up little bits of what I'll need to grow successfully, Every pay period. I'm just waiting for seeds to show up now, and trying to decide on res size while I wait. I've got a combination of options I can go for, from using 25 gallon totes, which would run 40 gallons of water, all the way down to 5 gallon buckets which Would run 8 gallons... (Using two of each) Using a bigger volume of water would give me more control over ph and ppm (or so I've read), Which in turn would make it easier on me... But I'd need to re-up on nutes 3/4 of the way through if I go above 1/2 strength.
right, how do i answer this correctly then....
well, what i do is basically painting by numbers with a bit of colour coding. i only use a 20L res so really struggled for the first few months till someone pulled out the sock puppets and stopped hitting me with jargon.
your ppm is parts per million of the nutrients in the res. all youve gotta do is follow the number on the stick. if the number drops you up the nutes. if it rises you add more water.
using a much bigger res will keep this number a lot more steady but it will also make it harder for you to see how much theyre actually taking in wich might cause a few problems till you suss it out properly.
as a general rule i start at 100ppm for newborns and raise it 100ppm per week, roughly till about 1200. then start finishing procedures . by keeping it to small increases every time theres much less chance of problems.if you
do run into something its also a lot easier to fix.
to get my 100ppm i check the manufacturers reccomendations for full strength. make up a batch of that and see what ppm it is. keep the ratios the same but divide the amount accordingly to make 100. now i know the ratios to make the 100 i can make up exactly whatever ppm i want without any guess work.
then comes the colour coding.
if it turns dark green. too much N so drop the a&b
it stems turn purple a lack of P so up the a&b
tops turn yellow up the calmag with added iron.
because i up the nutes the way i do there really isnt much else that can go wrong.
hope that helps you out bud : )