P toxity- Help recovery program

It certainly looks like things are tough with those poor girls but I've seen lots worse. Got some nice colas there and most of the damage seems to be in lower portions of the plants. Some of the leaves look like nute burn/toxic salts buildup so I would go easy on the N.

A nice medium level of well balanced nutes leaning toward extra K more than P should see you thru to a decent harvest.

I don't like spraying anything except in emergencies and never when big buds will be impacted and I don't think spraying now will make any difference for your situation so it's good you didn't do it.

Fingers crossed!

Cheers, so if I continue just with the regular Canna Aqua Flores as I would meant to do in the first place without all this screwing around....that one is low in N , but everybody has been talking about going easy with PK because that is the one I added too soon,,too much...well just the regular amount of Big Bud as it states on the bottle...but yep it is not in Canna Aquas regime , so that was my experiment to combine 2 brands and it back fired...could also have been the AN b52 who knows how it reacts with Canna's balanced nutrients or the combo of them two.....+++ I also have the active air intake tube in this side with those plants which look like that...the others look fine with exactly everything the same , same strain same tent same feeding same light etc.
So anyway what I was saying that the yellowing side has the intake air tube among the plants and it was bend in the way that it was blowing cool air on the plants, outside temps like 39.2-42.8 F. ...so they got that cool air on them even when the lights where off...uuups ! So they have gotten cold at nights for quite some time...that can be one side of the story..?!

Not going to help getting them chilled like that. Can you extend the tube so the air dumps on the floor away from the plants and the fans mix it up? Even if the tube dumps the cold air up high is fine as long as it's not blowing air directly on the plants.

Be a real Ooops of that was the whole problem.

I use mainly Advanced Nutrients for almost everything except CalMag as I use very little of that.

Just got gallon jugs of the 3-part, 500g can of Big Bud and by Friday will have a 500ml of Rhino Skin, 250ml bottle of Bud Ignitor to experiment with for the first time, and some quality but other brand of CalMag.

I'm using some off-brand potassium silicate I grabbed when I bought the BB and 3-part stuff but it's a PITA as I have to pH adjust my RO water after putting it in before adding nutes. Goes up to 9 and should always be added first. With the Rhino Skin from AN I put that in first then add my nutes and I'm good to go without even checking the pH. Love the pH Perfect nutes and my pH pen sat on the shelf for two years. Glad it still worked OK after soaking for a day in storage sol'n as it was near new when I retired it.

I really don't know if the cold air was the whole problem very hard to say...but the inside temps where still imo like not that cool even the cold air was pumped in when lights where of...but yep it blowed on the plants...my bad...and yeah its turned upwards now..but can't get it in the sealing it bounces against a tube in the sealing and might bounce a bit still on the plants but I try to have the vents closed when lights are off...

So I am going for the 3 days flushing with the small amount of nutes which left after plain water filling the 0.8 EC ,also I added some rhizotonic and nitrozyme to help with recovery, after the 3 days there probably isn't anyway anything what would clearly indicate that the recovery is done and give as some more food...what do you think...probably I won't see the EC dropping and leave tips bending up like a sign for more nutrients for us please...any comments...and because of the Rhizotonic and Nitrozyme I don't want to start emptying the tank to get away some resolved PK from root zone...it is anyway so weak solution...so I am going to try continue with the Canna Coco instead because I have that too..