I forgot to mention the soil is B&Q verve.

I just did a little test that I read on a blog on the fox farms website. 

I got some of the verve soil and mixed it with PH adjusted water and the run off was even lower at pH 4.9

Id be running off to the shop to get dolomite lime but I can't get that anywhere. So I thought what if I flushed the plants with my soft tap water with its pH value of 7.8 surely that might bring the pH up nearer 6

Sounds like you live near me and my local shop (the range) sells garden lime.

your soil ph range is a little low and not sure the tap water will balance it out, if you can't get any lime I have crushed one egg shell up into dust and used this to adjust the soil ph level in one 15ltr bucket as the acid in the soil will dissolve the egg shell and raise the ph level upto 6.8 

it's not great but it will help 

@jacks_farm

Cheers for that man. I actually do have some egg shells that I already crushed up but hadn't added to condition the soil. I was under the impression that the shells would be used to defend against a calcium deficiency. But after doing a wee search online it does seem that the shells can can raise the pH. So I'll try that. 

Still wondering though if it would better to just go with the flush. But using pH adjusted tap water instead of my first thought 

Where you've mentioned living near me. Is that because scottish water is considered soft. 

Cheers dude. 

@thestars

don't know about soft water lol

sounds like you have hard water with a high ec 

it was a guess because your tap water hp is similar and you have a b&q selling the same soil as my local one does

but I live in the south east of the uk

don't think flushing the soil going to make any diffence, only works when you have added too much bottle nutes 

have you added some sand and other dryed food ?

Any chance you could get a pic of the plant posted. It would be easier than everyone guessing at the problem and noting much tells the story like a photo.

@jacks_farm

I think the last time I checked everyone in Scotland gets soft water and in England it's hard. 

The guy at my local grow shop said to me that we have the best water in the UK for feeding our plants. 

It seems that the verve soil is rather acidic, this seems to be the case when I mixed a small amount of soil with PH adjusted water and tested that for the result to be a 5.1 compared to the water at 6.2

My soil mixture consists of 70% verve and 30% perlite. And nothing else... I've no concerns about how the plants look apart from one plant looking alot lighter in colour than the other 5. 

Talking about ec I haven't yet bothered with this in any of my grows. I do have a pen of some sort but I don't know what it's meant to measure. Maybe you can tell me what the below picture tells us.

 Cheers dude. 

Posted by: @monkeydo

Any chance you could get a pic of the plant posted. It would be easier than everyone guessing at the problem and noting much tells the story like a photo.

I suppose I could. I'd have done this to begin with but I vowed that I'd not be posting pic's of my plants on a cannabis forum after being busted twice in one year. I'm just ultra paranoid. But I suppose It makes no difference because here I am talking about it lol.

The low pH run off is occurring to all the plants.. Ranging from 5.1 - 5.3.. Out of them all only one plant looks slightly off colour than the rest.

@thestarsThats not far off what I get , 170 ish ,out the tap , there is a map online somewhere , from a soft wales 😉

@thestarsThats not far off what I get , 170 ish ,out the tap , there is a map online somewhere , from a soft wales 😉 finding out what your reading will help as well ,ec or ppm , i screwed up big style with those 2

OK here are some pictures. Looking a bit droppy as they've just come out of darkness and were watered before lights out.

The biggest one is on day 27

The rest are on day 21

They are all seedstockers critical xxl autos

Lights out for 4 lights on 20

Temps are a steady 25-26

Lights out temps 19-20

RH 60-70 %

The bigger of the 6 has had no nothing. Just water

The other 5 have had 

Growth technology Formulex at quarter strength the bottle says 7 ml per litre I've been doing 2ml per litre from day 1 up until day 14

Been only feed half strength cal mag on 2 occasions @ 1ml per litre day 14 and day 18.

Since then just Ashbeck mineral water with a pH of 6.5.. Just recently changed to tap water with its pH of 7.8 and after a drop of pH down its usually buffered to ph 6.2

Cheers 

The 3rd picture down is the only plant that concerns me. She looks a bit light in colour compared to the rest. But there run offs are all the same 

Cheers 

@thestars

I would like to know everything about your setup because you are doing something wrong or you telling the wrong friends or family, somebody is grassing you up.

Most growers go years without any problems.

Your not going to get caught putting pics up on this site, just remove any tags to be safe and shift and delete any pics that you upload to the computer.

That's sort this problem out together @theaters, pm me if you are unsure about anything.

Posted by: @thestars

The 3rd picture down is the only plant that concerns me. She looks a bit light in colour compared to the rest. But there run offs are all the same 

Cheers 

Your plants look very healthy and your doing a great job  

What light have you got ?

what's size is your flower room and do you have a fan/filter ?