ph consistently over 6 in coco slurries

[stonedstoner]

hey guys,

so i'm growing in pure canna coco in 3 gallon smart pots. i've been doing slurries consistently throughout flowering. my ph has been crazy high though. it is currently been reading at 6.4, but has gone up to 6.7 in the past. right now i'm in week 5 of flower. i have been using compost teas on a weekly basis conisisting of molasses, ewc, alfalfa, og biowar foliar and root packs and a few other things added sometimes. have been giving each plant about a litre of straight tea on a weekly basis. the plants are fed with blumats, so they are constantly very moist. a litre of straight compost tea per plant usually gives me a little bit of run off. my guess is that the tea is causing the high ph in my coco because the tea is coming out at over ph 7. i haven't been phing the tea, but have now started to ph the water a bit lower before i start brewing the tea. is the tea the cause of my high ph in the slurries? i've been flushing with low nutrient solution water but can't seem to get the ph of the coco lower than 6.4 ph. i think it may be causing lockout of phosphorus because even though recently i have been feeding very low (1 ec)...the ec of the slurries have been over 1.4ec. this leads me to believe that phosphorus is being locked out, not being taken up by the plants, and is staying in the medium because of the ph of the coco. before i started adding phosphorus boosters (aptus peakboost) and during the stretching phase of flowering with just using fasilitor, canna a+b, zyme, roots excel, cannaboost, dripclean...the ec of nutrient solution was 1.4ec to 1.6ec. the ph was still high but at a stage when not a lot of phosphorus was in the nute solution and when the plants weren't asking for a lot of it, however the ec of the slurries was right where i wanted it...around 1ec, so nothing was building up. is it the tea that is causing my coco ph to rise so high? what can i do to lower the ph?

additional info: i'm using canna coco a+b nutes with cannazyme, cannaboost, aptus peakboost, aptus fasilitor. ph of nutrient solution has been 5.8 or lower since start of flower.

 

[Asslover]

Are you having deficiencies or just chasing your ph?

 

[stonedstoner]

during the first few weeks of flowering my slurries were reading around 1.0 ec which is where i wanted to be at, and my ph in the slurry was anywhere from 6.4 to 6.7...but the plants were looking great. then i started adding my phosphorus booster, peakboost, in very small amounts to my res, the ec of the slurries was getting a bit higher and last week it kind of suddenly jumped up to 1.7...there was a little burning on some plants. it got me thinking that the ph of my coco might be too high for the plants to absorb the extra phosphorus i was giving them because it was getting locked out and just staying in the medium. so i'm trying to figure out why the ph of the coco is so high and why it's so hard to bring down. thinking it might be because the ph of the teas i have been giving them have been high.

 

[Buddler]

IMO Sounds to me you started out organic with the the tea and bennies so checking ph should not be required. then you switched to chem ferts in the fifth week of flower,so if plants were looking happy why change in the middle of cycle ? usually its one or the other but not both.. If it was me I would have stuck with tea till end and see what ya get ,nice tasting organic smoke.B

 

[stonedstoner]

i've been using canna a+b the whole run and have been doing teas weekly throughout the whole run...didn't switch from only teas to chem nutes. i've been using both.

 

[bunsey420]

IMO Sounds to me you started out organic with the the tea and bennies so checking ph should not be required. then you switched to chem ferts in the fifth week of flower,so if plants were looking happy why change in the middle of cycle ? usually its one or the other but not both.. If it was me I would have stuck with tea till end and see what ya get ,nice tasting organic smoke.B

I don't think that the ogbiowar + molasses and ewc constitutes a nutrient filled tea, just more for the bennies

 

[MIway]

some batches of coir come in very alkaline, others very acidic. cannot speak to the chemistry of it, but when you get a batch of this sort it tends to hold that value all the way thru... you will be fighting it the whole way. assuming this is your prob. best to test each bag/bale prior to planting.

 

[Buddler]

i've been using canna a+b the whole run and have been doing teas weekly throughout the whole run...didn't switch from only teas to chem nutes. i've been using both.

Sorry didn't notice you re ruuning both. canna usually quite stable so I would think the tea is the culprit or high alkaline water. If plants look good that's all that matters ,I used to check runoff and it was around 7 with my tap , plants looked good so I stopped. Never done a slurry test..

 

[omera1]

im in week 3 flower and have the same problem. gave them the first tea last weekend, and my runoff ph is now at 7. it can only be the tea that cause this high ph because before the tea the runoff was perfect all the time. 1 tea, then 7 days of perfect nute solution ph 5.8 with 40% runoff and now a ph of 7... fuck. now i have a P and K lockout. dont know what to do now -.-

 

[Coconutz]

I would never put something into coco that wasnt ph'd.
Most people using chem ferts usually add the tea to their ferts and it should stay in range.
The microbes will naturally raise your ph a bit from what I rememeber.
I skip all that now and just feed base nutes.
Have you been following the aptus schedule?
It sounds like you are using a lot of products and I suggest you cut them completely for this round and consider playing around with them on a healthier crop.
What you want to do is reset your coco with a low nutrient solution flush.
Dont upset the roots too much by pouring a shitload of water right through it though.
Go back to just ab at the rate youre already feeding and hope for the best.
If it looks like you need more of something just up the base.