ec

Flowki

Flowki

Well-Known Member
For light mix soil, If you had water ec of 0.13 what level would you be looking to raise it too with calmag and at what stages. Also, what level would you raise the base 3-1-3 feed to after the calmag also in all phases.

For example, if

1m calmag per L takes water to 0.45
3m base per L takes total to 1.13
 
dandyrandy

dandyrandy

Well-Known Member
Hard to tell what particles the EC meter is reading. I usually just go by experience with calmag in my promix. The label says zip so I start with a couple ml per gal on a small plant. I grow in 5 gal. By the time it's 3 ft plus It's needing 5ml or so. Just the way I have had it work for me but I'm not really a very good grower to ask. I do ec my ferts and run .3 to 1.2 is so as it grows. ymmv
 
Flowki

Flowki

Well-Known Member
dandyrandy said:
Hard to tell what particles the EC meter is reading. I usually just go by experience with calmag in my promix. The label says zip so I start with a couple ml per gal on a small plant. I grow in 5 gal. By the time it's 3 ft plus It's needing 5ml or so. Just the way I have had it work for me but I'm not really a very good grower to ask. I do ec my ferts and run .3 to 1.2 is so as it grows. ymmv
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I would safer assume the base water is something to the tune of a weak cal mag so would treat it as such. Just wondering what levels of actual cal mag one would add to 0.13 base water to bring it up to a decent level. 0.4 for a mature or more?.
 
dandyrandy

dandyrandy

Well-Known Member
Assumptions aren't science. My softened water reads a high ec but has lots of sodium. But I don't know your water source. Where I live I can get the breakdown from the water company but it changes depending on rain etc. at the wellhead location. My ec before softened ranges from 650 to 450.
 
C

churchhaze

Well-Known Member
Very little calcium and even less magnesium is supplied by tap, even for people with very hard tap. The majority of calcium and magnesium is supplied through the base nutes or the medium. The product "cal-mag+" has been a major marketing success and has convinced 90%+ of RIU members that RO water will inherently cause calcium deficiency... if you don't get their product.

The reality is that most major A+B base nutes are already designed around RO water.
 
Enigmatic Ways

Enigmatic Ways

Well-Known Member
churchhaze said:
Very little calcium and even less magnesium is supplied by tap, even for people with very hard tap. The majority of calcium and magnesium is supplied through the base nutes or the medium. The product "cal-mag+" has been a major marketing success and has convinced 90%+ of RIU members that RO water will inherently cause calcium deficiency... if you don't get their product.

The reality is that most major A+B base nutes are already designed around RO water.
Click to expand...
I use RO water and never once have I used a cal-mag supplement...If your base doesn't supply enough you need to switch your base.
 
Flowki

Flowki

Well-Known Member
I'll try and make it more simple.

If you had RO water and a base with no cal/mag, what EC (not ppm) would you raise the RO water too with cal mag. A ball park figure is fine, a range of ec depending on size is fine. But please give an EC value and state the stage of growth.
 
testiclees

testiclees

Well-Known Member
dandyrandy said:
Hard to tell what particles the EC meter is reading. I usually just go by experience with calmag in my promix. The label says zip so I start with a couple ml per gal on a small plant. I grow in 5 gal. By the time it's 3 ft plus It's needing 5ml or so. Just the way I have had it work for me but I'm not really a very good grower to ask. I do ec my ferts and run .3 to 1.2 is so as it grows. ymmv
Click to expand...
When my high brix buddy sent Pro mix hp in for analysis the consultant told him it was already too high in K

Here's promix analysis

https://hydrofarm.com/downloads/fc/HydroFarm - Info Sheets_PT20281_20381_7093.pdf
 
dandyrandy

dandyrandy

Well-Known Member
testiclees said:
When my high brix buddy sent Pro mix hp in for analysis the consultant told him it was already too high in K

Here's promix analysis

https://hydrofarm.com/downloads/fc/HydroFarm - Info Sheets_PT20281_20381_7093.pdf
Click to expand...
I'm not sure which Pro mix I have, I get it at Menards. I know if I keep my ratios from past cycles it seems to work. I'm just a monkey see and monkey do grower. I try to read the plant, to green etc. But it seems with the LEDs I need tons of calmag. But the growth is amazing. Thanks for the link. I'll have to head to the wood shed and check the partial bag and see what Menards sells.
 
guerrilla medic

guerrilla medic

Well-Known Member
Flowki said:
I'll try and make it more simple.

If you had RO water and a base with no cal/mag, what EC (not ppm) would you raise the RO water too with cal mag. A ball park figure is fine, a range of ec depending on size is fine. But please give an EC value and state the stage of growth.
Click to expand...
Use a nutrient calculator(cannastats, hydrobuddy)to figure it out. If your base truly has 0 calcium or magnesium you will definitely want to address that. .13 ec is damn near ro water. Usually 40ppm of mag and twice as much calcium will do in promix.
 
Flowki

Flowki

Well-Known Member
guerrilla medic said:
Use a nutrient calculator(cannastats, hydrobuddy)to figure it out. If your base truly has 0 calcium or magnesium you will definitely want to address that. .13 ec is damn near ro water. Usually 40ppm of mag and twice as much calcium will do in promix.
Click to expand...
Ok thnx
 
bravedave

bravedave

Well-Known Member
dandyrandy said:
It's Pro-mix all purpose mix.
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Yeah those $13.97 for 2.0-2.2 cu. ft. Lowes/Menards Promix bags have more peat and less everything else of what's in HP. I have used both. I usually get the cheaper version you are using and augment with more perlite and more myco. I used a CaMg additive the first time I used it. Since have dropped using CaMg and only add Mg (epson) and things are happy.
 
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