Day 49 - Third rez change since seed! (four if you count first fill-up)
I got to tell you, I love this system. I'm getting to know it better now, and boy does it live up to my expectations. pH and EC are rock solid, growth speed is amazing (even though my girls are a little behind in comparison to fellow AutoUltimaters) - but above all, I did absolutely ZERO corrections since last rez change two weeks ago - Half a day's work resetting the rez equals two weeks off daily feeding chores. Oh the bliss....
The way I'm going about it is I prep the aquatank with an EC slightly higher than the system, without cannazym or rhizo or boost. Only base water cal mag and potassium silicate, A&B and pH correct. Since its all mineral it should be good for quite some time with proper water movement and oxygen. Seems logical now, but I'm reducing Cannazym & Rhizo and Boost from the system mix, adding directly in at a weekly basis. Since these are "organic" in nature, there is no symbiotic soil stuff, they should be really good for a week the start losing properties. So every week is enzyme, rhizosphere and booster fest.
Coming from coco though, these babes are flowering much sooner, so I'm hoping for early January smoke-out
I would gladly go for another week without changing rez, but I dont want to risk any more trouble until this grow is over. In fact, judging by the amount of drinking done, at this stage, and with a fresh rez change, and a topped-up pre-loaded aquatank ... I could very well leave this alone for three to four weeks (if fully dialed of course)
But, its pK boost week, nothing like a fresh rez change to treat the ladies right right before they become fat fekkers. Also, the tallest girls is showing signs of distress. I think cal mag deficiency, but would love some input. Everything points to that, but unsure. I had to go by gut instinct. Took some pics during lights-off some I could show you the color better... So I increased cal mag by 50% and silicon another 33% to help fight it and hopefully get a stronger plant. Ive never gone over 1ml/L of silicon I think. Nothing much I can do except try to find the sweet spot between the four of them.
Stretch is nearly over, even though I preemptively raised one LED as high as it would go. I've found some girts still love to put on height even after stretch period.
cal mag 0.75ml
silicon 1.5ml
A&B 2.4ml
PK 1.5ml
Cannazym 2.5ml
Rhizo 2ml
Canna Boost 2ml
I didnt have much time unfortunately to take proper readings, but I would say base water with cal mag silicon = 0.8EC so the feeding part should be around 1.5
Total EC is 2.3, pH 6.1
Here is the girl in trouble. Not really evident, but a off colour yellowing throught the veins out, sort of like N deficiecy but a darker weirder tone of green. Also, a few leaves showed the typical rust spot, this this was my reasoning for cal mag deficiency
Cant lift the lids any more, but I certainly do see new growth floating back up making the root ball even more massive
Group shots
Thus far, the biggest trunks ever!
Promiss I�m not doing this on purpose, it doesnt show up upside down when uploading...
Stay tuned, in a bit I'm updating about the XL system!