help! need advice plz

trust me, you want you ph in soil around 6.1, not your water and mixes. ph at 6.3 and you should be good. i talk to many of growers in coco and they never ph their mixes for coco lower than 6.0 and thats only during the flowering stages.

mag and cal as of now, 5th pic tells it all.

are you using any ro water or calmag supplement?

here's what i would recommend you do, either drop the ro water (especially if you tap water ppms aren't that high), and add some cal mag to your nute regime. after you make your mix adjust ph to 6.3-6.4 and i'll guarantee that your issue stops.
i am telling you from experience, because i too had the same issues and stopped listening to what others heard and went with common sense. fact, ph fluctuates back and forth and if you're ph'ing at 5.8 and your ph fluctuates -1 or -2 you're going to lock out a lot of key elements.
if you google or visit most of these sites, people will tell you that coco stores or builds up a lot of salt and this is the main reason why.

after researching, trail and error, and talking to a lot of experience growers, ph'ing your mix that low in any soilless medium is going to cause nothing but problems. why you think there are so many help me threads here? i hate to say it, but this site spreads nothing but misleading info.

take what you want from it, the decision is on you. if need be, i'll post some pics of my first shot a coco (which is my current run) and prove to you what i know as oppose to what someone heard and puts down in a post.

I'll bet ya a quarter you are doing one of two things........
1) Using RO and adding pH up at the end to adjust pH. I bet you are adding it straight, without dilution. That is a mistake.

OR

2) Using tap water and adding acid at the end to adjust pH. I bet adding it straight, without dilution. This is a mistake.

Both scenario's lead to massive shifts in ph, and cause micro lockout. The vast majority of pH "lockout" issues are about mixing properly and less about final number. I run 100% coco and my pH is often as low as 5.5. Dont let anyone tell you differently. Correction will depend on which reagent you are adding.....base or alkaline. Also, silica is very alkaline and can cause the same issues and thus must be added first or certainly before cal. Alkailine products in particular lock out cal in the form of cal phosphate. Hope this helps.

If you look closely at pics it appears new growth looks good? IF thats the case I'd be sure your'e mixing nutes properly and add cal/mag plus if not already in. Easy peasy.

wat is ro water? im using tap water leavin it to stand for 24 hour then adding canna a then addin b affter i leave it for a few hours then i feed them

oh and check the ph befor i feed them which is about 6.2-6.3

Cool. Lower pH to 5.8 and you are set. Is new growth looking good?

junglingirl69 said:

im growing in coco

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Coco = hydro for all intents and purposes.

looks ok not look amazin

Fresh 2 De@th said:

trust me, you want you ph in soil around 6.1, not your water and mixes. ph at 6.3 and you should be good. i talk to many of growers in coco and they never ph their mixes for coco lower than 6.0 and thats only during the flowering stages.

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You talk to them? You don't do this yourself but feel expert enough to dole out the advice?

Ok, time to educate yourself. Google "Cation Exchange Capacity" and CEC of coir. In a nutshell, coir is negatively charged and will hold ions rather than give them up. Once the threshold of the coir CEC has been reached the ions become far more available to the plant. Translation- keep feeding an appropriate nute strength until this threshold is reached. Things will change drastically. Coir can hold cal,mag and phos in particular until it is "charged". If your concerned post another current pic and we we can take a look. I would lower pH to 5.8 tho. Hope this hepls.

+rep to GK1 for teaching something useful.

GK1 said:

Ok, time to educate yourself. Google "Cation Exchange Capacity" and CEC of coir. In a nutshell, coir is negatively charged and will hold ions rather than give them up. Once the threshold of the coir CEC has been reached the ions become far more available to the plant. Translation- keep feeding an appropriate nute strength until this threshold is reached. Things will change drastically. Coir can hold cal,mag and phos in particular until it is "charged". If your concerned post another current pic and we we can take a look. I would lower pH to 5.8 tho. Hope this hepls.

Click to expand...

Very informational.

cheers man

iv just feed them this afternoon at 6.2 i wanna see how they react to it then on the next feed i will drop it to 5.8 u think i should do that then

gk1 thanks for that iv just feed them this afternoon at 6.2 i wanna see how they go with that then on the next feed i will drop it to 5.8 u think i should do that then

Since you've already fed, yes, change it next time you water.
Are you more comfortable with the 5.8 now with 3 of us agreeing, and your research (did you check out what GK suggested?)?

yeah i do now thanks guy

No problem.
That's the problem with forums, everybody has something different that they have tried or heard, and the person asking the question has to choose who or what idea/ suggestion to listen to.