Help what's gone wrong

Hoping you can help

Noticed today my leaves have got worse.

At 1st I thought I had a cal mag issue but I'm in hard water so didn't think much of it.

Have added cal mag a couple times and problems seemed to not get worse.

Any idea what's wrong

I'm in rdwc using ghe 3 part. 2nd week into veg

Calcium deficiency. Whats your ppm.
Calcium is easy to fix but will take some time to get back to normal. Once the necrotic spots show you can reverse the damage, only prevent future damage. It shows itself in the oldest growth first as its an immobile element. Immediate remedy is to foliar with Calcium nitrate but this will add Nitrogen and you may get the claw for a week or 2. But it immediately supplies Calcium in a mobile form. Dose your nutrient resivore with cal/mag every nutrient change or top off.

Sorry... can't reverse damage, only prevent future damage.

lockout greengenez 421 got ya ph off. For sure.

What are your ppm and ph? It may not be lockout. Could just be water quality, or possibly improper mixing of nutes. If a and b come in contact without being properly mixed individually this can bond the calcium and crystallize it.

l suffer through veg, cant do it, but flower, got it down calmag every feed kelp flour same silica 40% strength main nute, labs and mollasses pinch of epsom, my calmag is 900 but use half teaspoon in 5 gal dont toxify with nitro. Week 5 they start losing colour, and go all the way.to week 8 growing and maturing, this grow l have plants all weeks apartq so l can crop over a longer period, trimmings a bitch. My water is ph 9 to 10 and 550 ppm. From tap. Started using 1 third spring water but dont think it matters.

Don't flower until you remediate the calcium deficiency. Calcium will lead to mag deficiency. Mag is a crucial building block for many elements as it regulate osmotic functions within the tissue.

How's the roots and pH?

So my pH is steady around 5.8 - 6.3
I'm a week and half into flower. At the time I fought I had it under control giving call mag.

Roots all looking nice and white. No slime

They have been in veg for about 8 weeks while I mainlined them and got them to a fairly big size.

Currently feeding 1.6ec with a base of ,5 so around 2.1 in total.



I'm not using ro so it's plain tap water there having

I would rule out sap sucking bugs (carefully scope under-sides of damaged leaves) just in case.

Space_monkey said:

So my pH is steady around 5.8 - 6.3
I'm a week and half into flower. At the time I fought I had it under control giving call mag.

Roots all looking nice and white. No slime

They have been in veg for about 8 weeks while I mainlined them and got them to a fairly big size.

Currently feeding 1.6ec with a base of ,5 so around 2.1 in total.



I'm not using ro so it's plain tap water there having

Click to expand...

You most likely have a cal/mag whore strain. Up the cal/mag. Your specs looks good for 8 weeks. They're able to take full strength at this point. Keep an eye on it and if the necrotic spot spread to more leaf mass then id do a foliar. If vigor is still good then proceed to flower. If not, remediation is needed before you bloom.

Normally I'm against RO as most people don't need it, you might.

Space_monkey said:

Hoping you can help

Noticed today my leaves have got worse.

At 1st I thought I had a cal mag issue but I'm in hard water so didn't think much of it.

Have added cal mag a couple times and problems seemed to not get worse.

Any idea what's wrong

I'm in rdwc using ghe 3 part. 2nd week into veg

Click to expand...

Space_monkey said:

Hoping you can help

Noticed today my leaves have got worse.

At 1st I thought I had a cal mag issue but I'm in hard water so didn't think much of it.

Have added cal mag a couple times and problems seemed to not get worse.

Any idea what's wrong

I'm in rdwc using ghe 3 part. 2nd week into veg

Click to expand...

if you live in a hard water area it shouldn't be calcium in anyway as that's what hard water is !!

Have you upped the nutrients recently ?

How hard is your water? What's the EC? What's in it? Have you looked online to see if there is a water quality report for your municipality?

I wouldn't just go dumping more stuff. I ran GH in hydro and never used calmag and never had any problems. The micro has 5% calcium and both the grow and bloom have magnesium. If you have hard water you should have more than enough calcium and magnesium because that's what's in the water to make it hard. You probably have too much and adding more is not what you should be doing.

I know many are always quick to yell deficiency and add this or that but often the problems are from having too much of something. Too much Ca and Mg can cause problems with other nutrients due to nutrient antagonism.

Without knowing the makeup or EC of your water I can't say for sure but I agree with @DaFreak that you might need to look at another source for your water. But I highly doubt that your issues are being caused by a lack of calmag. It's hard to see in those pictures but it looks like the start of some clawing so you're already feeding all the plants can take.

Looks like nute burn and low humidity but really hard to tell. If the cal mag has stopped anything getting worse then your fixed ! Once leaves are really damaged it can't get better just stop getting worse !

I have had low humidity.
I thought the cal mag had helped but obviously not.

Gonna do a res change and make sure everything is right.

Space_monkey said:

I have had low humidity.
I thought the cal mag had helped but obviously not.

Gonna do a res change and make sure everything is right.

Click to expand...

Late to your party. Just growing monkeys. Soil guy with GG4 for a long bit. Looks like toxicity. Raise your res PH to 6.4 min and use tap water.

Pitfalls of out smarting nature.

Right then. Spent some time in there. Had a bit of a light leak so all sorted that.

Checked pH again and it has dropped to 4.8 so used some pH up.

Have ordered a ro kit but will take all day to fill my 250l res.

As soon as the RO filter comes I will run with just my GHE nutes and cal mag.

After looking at everything closely I think it's a mixture of to low humidity and ph.

Have tried betting my humidifier in there but it's just not man enough.

Hopefully I've not lost to much time on it

Thanks everyone for such a quick response