Calmag Question - and value conversion question

[MK1000]

Hi All,

I’ve been using filtered water with 12mg/L Calcium and 8 mg/L Magnesium to water two F1 Epsilon autoflower cultivars. I’ve been adding Organic fertilizer from BioBizz to this water.

One looks broadly ok, the other seems to be suffering from what looks like nutrient deficiency. So I’m planning to up the fertiliser dosage and switch to local tap water after getting pretty low PPM readings from last run-off (mere 380 for healthy plant, 340 for the sadder looking one). Plants are mid flower.

I’m new to this and know this ain’t right, but am trying to fix it.,

My question is, do I need to add CalMag to next watering if the local water is as follows (please forgive me, the values are in a different measurement and I am not sure how to convert to mg/L):

Calcium 267 mmol /Liter. Magnesium: 0.48 mmol / Liter.

I appreciate any advice or insight!!!

[DanB]

Welcome to the forum,
A support ticket will help us help you. Can you please fill out a support ticket? Please include what type of water you are using (RO, distilled, tap.)

COPY/PASTE the below list into your forum post.

Answer these simple questions the best you can.

If you do not know, or do not use something; Just say so; Or post

NA (non-applicable)

• What strain, Seed bank, or bag seed

• Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF

Soil brand and type

• Vessels: Pots, Grow beds, Buckets, Troths

• Runoff pH

• Runoff PPM/TDS or EC

• Indoor or Outdoor

• Light system and wattage

• Temps; Day, Night

• Humidity; Day, Night

• Ventilation system; Yes, No, Size

• AC, Humidifier, De-humidifier,

• Co2; Yes, No

If growing Hydro some additional questions:

-DWC? RDWC? Autopots? Ebb and Flow? Other?
-Distance of liquid below net pot (DWC)
-Temperature of reservoir
-TDS of nutrient solution
-Amount of air to solution

Always try to upload a clear picture of any issues you may have to allow the community to assist you. Pictures taken under natural or white lighting are by far the best.

Add anything else you feel would help us give you a most informed answer should be included. Feel free to elaborate, but short and to the point questions and facts will help us to help you in a more efficient manner

[MK1000]

Ok, thanks @DanB. Details requested below. After the asterisks.

Im attaching some pictures. One plant looks pretty ok to me, the other (in the back) is lighter in colour and a couple of leaves, also physically damaged, have a kind of purple look to parts of them.

Plant with lighter leaves showing signs of some deficiency is also developing her flowers more slowly than the healthier one, even though they are exact same age.

---

• What strain, Seed bank, or bag seed
RQS F1 Epsilon Cultivar

• Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
Soil

Soil brand and type:
Plagron Grow mix (with 1.5 L perlite added to each of the two pots)

• Vessels: Pots, Grow beds, Buckets, Troths
Fabric pots (3 Gallon, filled about 3/4 full)

• Runoff pH
Don’t know. Only just got a PH tester, will test when I water next, I think today). But I’ve been watering with 7.0 pH filtered water + BioBizz Root Juice, BioBizz Grow, BioBizz Bloom and Bioz Biz Top Max. Following nutrient schedule. BioBizz claims their products brings PH down a bit…

• Runoff PPM/TDS or EC
PPM: 370 in one, 340 in the other
TDS: 740 in one, 675 in the other
PPMs of run off slightly higher than what went in: PPM 315. Sign of salt accumulation?

• Indoor or Outdoor
Indoor. Spider Farmer 2x2x4 Grow Tent

• Light system and wattage
Spider Farmer SF-1000D Full Spectrum LED Grow Light (100 watts)

• Temps; Day, Night
22c day, 20c night

• Humidity; Day, Night
50-55% day, 55-60% night (I turn the ventilation down a bit)

• Ventilation system; Yes, No, Size
Yes. 4” Inline Duct Fan, 4” Carbon filter, 6” Clip Fan

• AC, Humidifier, De-humidifier,
No.

• Co2
No.

[DanB]

looks to me like too high PH into the soil. once you get a run off test of the PH @MidwestGuy @Storm @merlin44 will be able to help you more bc of the support ticket if its not the PH but imo i think its too high ph locking roots.

and lighting think of it in this term 45-50watts per square foot of grow space

[merlin44]

Thanks for the tag @DanB

I agree with DanB on the pH. You want to have it between 6.3 and 6.5 for soil. The nutrient load (ppm) is very low. I don’t really worry about that so don’t know what the best numbers are but I am guessing around 1000 ppm or so. I think that the light color is due to the plants needing more nutrients. Improved pH and higher nutrient load will do it.

[Jayjay504]

Can I get some comments on my plants, first grow and just want to identify an and all problems. Thanks

[DanB]

Welcome to the forum,
A support ticket will help us help you. Can you please fill out a support ticket? Please include what type of water you are using (RO, distilled, tap.)

COPY/PASTE the below list into your forum post.

Answer these simple questions the best you can.

If you do not know, or do not use something; Just say so; Or post

NA (non-applicable)

• What strain, Seed bank, or bag seed

• Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF

Soil brand and type

• Vessels: Pots, Grow beds, Buckets, Troths

• Runoff pH

• Runoff PPM/TDS or EC

• Indoor or Outdoor

• Light system and wattage

• Temps; Day, Night

• Humidity; Day, Night

• Ventilation system; Yes, No, Size

• AC, Humidifier, De-humidifier,

• Co2; Yes, No

If growing Hydro some additional questions:

-DWC? RDWC? Autopots? Ebb and Flow? Other?
-Distance of liquid below net pot (DWC)
-Temperature of reservoir
-TDS of nutrient solution
-Amount of air to solution

Always try to upload a clear picture of any issues you may have to allow the community to assist you. Pictures taken under natural or white lighting are by far the best.

Add anything else you feel would help us give you a most informed answer should be included. Feel free to elaborate, but short and to the point questions and facts will help us to help you in a more efficient manner

[DanB]

will take a gander at it an say looking like cal-mag and ph off. what week of flower are you in? myself an other can not say 100% what it is but the support ticket will help get it as close as possible.

[Jayjay504]

What strain, Seed bank, or bag seed
Bag seed
• Method: Soil w/salt, Organic soil, Hydroponics, Aquaponics, KNF
Soil
Soil brand and type
Ffof
• Vessels: Pots, Grow beds, Buckets, Troths
3gallon pot
• Runoff pH
6.4 and 6.5
• Runoff PPM/TDS or EC
550 and 850
• Indoor or Outdoor
Indoor
• Light system and wattage
250 w HPS above/ (3)19 Watt full spectrum side lighting/two 4 ft t5s for side lighting/two 4-ft t8 in the corner for side light/and just added an 85 watt full spectrum LED for the front side
• Temps; Day, Night
Never checked in the room but my home ac stays on 73
• Humidity; Day, Night
Not sure
• Ventilation system; Yes, No, Size
Small oscillating fan
• AC, Humidifier, De-humidifier,
Home ac on 73
• Co2; Yes, No
No

[Jayjay504]

[Jayjay504]

[DanB]

Are the pics here vs the ones you first posted different dates? They look different. I’m not sure of a problem. Anything specific you could point out as concern?

[Jayjay504]

These re pics from a few days ago, maybe a week. I’m about 5 weeks into flowering and have gave nothing but tiger bloom until about a week ago I got Bushmaster Cal mag and Big Bloom and I gave some unsalted molasses about a week and a half ago along with some banana peel tea I made in the refrigerator. I also gave pump and grow stuff that has an NPK of 3-2-2. After I gave it that I think I noticed the nitrogen in the leaves but also thought I was having cow mag problems and when I gave a Cal mag it looked like it got worse but a few leaves ended up turning brown and dying and where removed but I’m trying to get them on the right track so any input about anything will be greatly appreciated as this is my first grow and I like to do things to the best so trying to learn as much as I can. I thank everyone in advance!

[DanB]

Main thing to understand is if you have a leaf problem at any stage of growth, the affected leaf will not repair itself but even when problem is fixed you will know problem is fixed when new growth is lush and green.

[Jayjay504]

Well a concern I have in these pics is the way some of the small leaves look in a few pictures you see how the growth on the end just looks different. On the plan with all the white on the sugar leaves I originally was concerned it might have mildew, someone else said they don’t see mildew on it. I was just fearing it from all I’ve been reading about the mildew that nobody wants. But I’m going to post pictures from what I seen this morning which was told was nitrogen toxicity but not sure I’ll it would be getting worse, I flushed already a couple days ago when it first happened maybe I need to flush again let me post these pictures

[DanB]

Don’t use pump 3-2-2 in flower. In flower she doesn’t require as much N. the pump stuff wasn’t MG liquid fertilizer?

I use Lotus Nutrients. Bloom 5-10-14
Lotus Boost 1-15-30

[Jayjay504]

[Jayjay504]

No it wasn’t mg. I don’t know why I even did it I knew not to I just figured it wasn’t a lot of nitrogen and I just had bought the stuff so I guess I wanted to try it. I have tiger bloom and Big Bloom for my flowering plants, I have a question I seen Cal mag has 1-0-0 for the NPK so that can be used in flower? Also for my vegging plants I have them in ffof and haven’t gave them nutrients yet, they were planted on October 1st and transplanted on October 21st into like gallon size pots now when I first started my two flowering plants I gave them Miracle-Gro liquid fertilizer and small doses a couple of times because that’s all that I have. The plants I have vegging right now have not received anything yet besides the ocean forest soil. They’re growing real slow one is a clone and one is a bag seed I topped them twice already and trying to do the manifold technique

[DanB]

Yeah definitely N. A flush once won’t run it out the plant already absorbed the nitrogen. I’m gonna let one of the more experienced growers take over from here. I don’t want to give you wrong advice.

[DanB]

Calmag nitrogen is fine. Don’t use MG products they are harmful time release and concentrate. I would try a second flush an right after give Bloom nutrients and see what happens not rly sure what else to do.