Originally Posted by gmanwho
phantom deficiencies! U maybe experiencing some type of fusarium or other fungal infection. similar problems plagued me for years. till i found out i was recirculating my problems.
i think 80-220ppm of calcium is recommended. then half of that number should be matched with magnesium in a 2:1 ratio. if i remember correct. u could try a foliar of calcium if your certain its calcium. biominn ca is a great product to foliar
seems like you have the other things in check. other then the 1500ppm of co2. go with 1000ppm till u get things figured out. i remember reading that after 1500ppm plants can close up the stomata an go into stasis. if i had to say im willing to bet some genetics may slow at 1400ppm, an others at 1600ppm co2, so why guess. tbh i dont think i see any difference at 1000ppm or 1250ppm. but then again getting to the last final % of dialing in there are 1000 other variables of importance. dial down to 1000ppm so u know your not slowing anyone, thats still almost 3x atmospheric co2.
its funny u mention jacks. i thought jacks was the problem for me cause i had other nutrients perform better under same conditions. read up on fusarium. try bleach or pool shock in the water. another disinfectant is hydrogen peroxide.
just because roots aren't roted doesn't mean u dont have a fungal infection. infections can disrupt the uptake of nutrients inside the stem. one genetic could fight it off more then the other making the plant seem healthier. infections can partially paralyze the plant. i could go on an on....
Alright, thx for the advice man!
Think I'll just unplug the co2 generator completely for a while and see what happens.
New set up is in a shop this time(old set up in a basement) and the co2 generator is located across the room from the co2 meter/controller, with the plants in the middle. It could very well be possible that their's more than 1500ppm of co2 in the actual plant area. In fact I'd almost bet on it.
That is certainly one thing that has not occurred to me until you mentioning it. it's been a huge mystery for me since it appeared that everything was so dialed in and I tried so many different things.
On top of that this is a strain I've grown for years and very familiar with, so the mystery problem has been blowing my mind. However I did grow other strains as well just to make sure it wasn't just the strain somehow and they all struggled with what appears to look like calcium deficient.
I do have some hydrogen peroxide sitting around as well that I haven't been using. I will now.
Thank you very much for your advice. That actually makes sense to me. Really doesn't seem like I left many stones unturned but that could certainly be one.