COCO COIR Coco ph problems

[Rayan]

Hello all good day

So im using canna coco mixed with perlite im using gh series my lights are hps1000w and 600w viparspectra ,, im in six week of flower and been having ph problems,, i water with 6.2 and comes out 4.2 the plant look bad the leafs the buds kinda slowly getting bigger compared to the other,, i flushed it and tested the ph it was 5.0 and fed at seedling stage then plain water the next day and the ph is getting low again 4.7

They told me the best way to raise it is to use calcium carbonate but i dont know how i just bought some today, i cant order stuff coz its illegal any growing related items so any help please


Ps: the one im talking about is the left one,, the right one is fine now but also runoff ph is 5.5 but the buds are getting a little bigger

[Mr.furley]

How big are your pots? How much water did you use to flush? When you flush at that low of ph you give them your 6.2 water untill it comes out 6.2.
Your buds look close but I can't tell from far away.

baking soda will raise your PH you will just have to test it as you mix it.

[Mr.furley]

" i water with 6.2 and comes out 4.2 the plant look bad the leafs the buds kinda slowly getting bigger compared to the other,, i flushed it and tested the ph it was 5.0"
So what I'm reading here is that you flushed and brought the PH up of the runoff water to 5.0?
Do not worry about your ppm's of the runoff, only look at the PH in and out. In a 5gl smart pot to raise the PH from 4.7/5.0 of the runoff you will be around 3 gallons of water going in at 6.2ph in one go.
You can give the plant a higher ph'ed water and it can act a little faster but I don't recommend it unless it is a emergency, if you do give higher then normal ph'ed water only raise it to 7.0ph at most and push a half gallon of 6.2 water after your runoff hits 6.2.
I would still like to know how close your plants are to being done? A close up picture of a bud in natural light?

[Mr.furley]

You are also saying you ph down you water? What does you water read before you do anything.
You shouldn't ph up and down the same water. Just checking.

[Rayan]

Mr.furley yes i flushed with plain phd water till i brought it up to 5.0 but after that it went low again to 4.7,, and I've used about 9 gallons to 10 can't remember,, and i dont think just flushing will raise the ph of the medium coz I've done that and wasn't that good and i didn't put more than 6.5 but maybe I'll try the 7.0,, I'll try to take a better pictures now and upload em,, i think they still need about 3-4 weeks its aurora indica from Nirvana

[Rayan]

Mr.furley

[Mr.furley]

How often do you give nutes?

[Rayan]

Mr.furley yesterday i fed today i gave plain phd water and so on one feeding one plain

[Mr.furley]

Imho you are overwatering your plants and in my opinion needs to let them dry out. I think This is the main problem.
I'm think you be have roots problems, like root rot that are more important.
If you have give 9 gallons of ph water to a 5 gallon pot and they don't have the same in and out pH then somethings off and adding ph up is not going to help but feel free to try.

Different people have different methods to growing in Coco, so opinions will very as watering practices do.

I personally would never water coco everyday day especially in that amount, your are 1)feeding and stripping to fast, not allowing time for the plants to uptake nutes, 2.)not allowing the roots to get air.

My advice is to let that pot dry out completely. then feed only 1.gallons of WATER WITH NUTES, when the pot is dry to the second Knuckle of your finger give 1.5 gallons of PLAIN PH WATER and repeat till your Final Flush in about two weeks.
The damaed leaf on your plant will probably not bounce back, but you are far enough along that you could should see some improvements with the buds.

https://www.growweedeasy.com/coco-coir

[NAKEDGARDENER]

Watching and learning.

[Jibblerjoe]

I'm thinking to much nutes