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So I make plain water at ph 4.5 and pour let's say 2l in each pot. Then I make my feed at ec 0.8 and what ph?

The calmag will arrive on Wed, unfortunately all shops are closed when I finish work so most of the time I buy on internet or during weekends.

I've been feeding them the same pH since the start, at 5.7 ish, the only thing is I watered them only 3 times during first 3.5 weeks, I've learned now and corrected my mistakes, today is the second day of my daily feeding. This is the coco I'm using https://goldlabel.nl/substrates/6040-mix.

Hello all, I've just watered them again today. The EC has gone down significantly since yesterday but the pH has gone up a bit. Any idea why and how to fix it?

I've also seen Rox for extra dense and big buds but that's pgr stuff

Which brand of calmag do you use?

I'll get the calmag asap and start using it. I'll water them daily with feed at 0.8 and 5.6 to bring them all to same runoffs and that should improve their health. Thank you very much and I'll keep you updated.

It's a shame they only do it locally, I'm sure with time and experimentation I'll find the right stuff. For now, as it's my first one, I will try to keep them alive and as healthy as I can.

I'll take a photo tomorrow without the mh bulb on. Pozdro

That's interesting, seems like my problems are to do with underwatering then as I was feeding them once a week. May I ask what brands of nutrients you use?

Ok, here come the results. Feed was 0.8 5.7 Runoff results: Plant 1 ph 6.7 ec 2.4 Plant 2 ph 7.1 ec 1.5 Plant 3 ph 7.0 ec 1.7 Plant 4 ph 7.2 ec 1 Plant 5 ph 7.1 ec 1 Plant 6 ph 7.1 ec 1.4 Plant 7 ph 7.1 ec 1.2 You can call me names, I deserve it. Please tell me what my feed should be to get...

oh shit sorry, 2ml per litre, got it

I haven't been adding calmag, was told a+b by dutchpro has it all (please excuse me I'm new and want to learn). So let's say I make my feed in 30l tank, a&b at 0.7, how much vitalink calmag do I add?

Seems like calmagic by general hydro isn't available in UK. I'll go with vitalink but I think they do 1.8-0-0. Here is the spec sheet http://www.vitalink.eu/wp-content/uploads/2017/06/Material-Safety-Data-Sheet-for-VitaLink-CalMag.pdf

Do you recommend that I purchase the calmag asap? If so, what do you think of the Vitalink CalMag?

I've prepared the feed. 0.8 and 5.8. I'll water them to runoff soon and let you know what the runoff measures at

I'm aware of pots being too big, 15l so about 3.3 gallons. I cannot do anything about it now. This is my first time and the only way I'm going to learn anything is by trial and error. I've done a lot of research before starting but it's really confusing as there are so many sources and most of...

I cannot water them daily, at least till runoff as the pots are too big to dry enough over a single day and watering them daily would cause overwatering.

I know it's not soil. I always watered them till runoff, I'll measure the runoff today and report back.

It's tough to find the right info as I've come across people saying to collect run off and adjust feed accordingly and others saying not to bother as it will stabilise itself. Therefore I've decided to go with the latter option and consult you to see if that is the problem. I've also seen soil...