Coco help please.

[Dankdad64]

I have a Hanna meter and I understand ppm. I'm having a hard time grasping ec and how to do it. This is my first coco grow. Canna coco and nutes. Any good videos or words of advice. I'm bad with math. Thanks for any help you can give.

 

[Ca++]

Is canna coco 4ml of A plus 4ml of B ?
It's on the bottle. Along with some sort of recommendation regarding the EC that would produce. Something like 1.2 + tap = 1.5-1.6?

It's certainly on the bottle.

 

[Dankdad64]

Is canna coco 4ml of A plus 4ml of B ?
It's on the bottle. Along with some sort of recommendation regarding the EC that would produce. Something like 1.2 + tap = 1.5-1.6?

It's certainly on the bottle.

Thank you I will look.

 

[Ca++]

Have you grown before the a ppm meter, and have a number in mind?
I can do a couple of conversions for you

Sometimes things come with instructions. It's the bit of folded up paper with foreign stuff on. EC instructions often contain a conversion chart, I'm told.

 

[chronosync]

mS is EC

my meter uses the Hanna 500 scale
its easy to convert in my head if I think of 1.0ec as 10 and divide by 2 .... equals 5
or: 600 x 2 = 1200 .... 1.2ec
500ppm = 1.0ec


so add the 4ml to a gallon and see how many ppm
adjust as desired

Its better to go by ec and or ppm rather than how many ml but after awhile if you are feeding the same strength you will know how many milliliters equals what ppm on your meter

A good starting ec for plants in veg is 1.0 - 1.2ec
seedlings more like 0.6 - 0.8ec

 

[Ca++]

My recent cheap ones have come in uS. Making an EC of 3.0 into 3000
It's easy enough to not see the dot anyway, so it looks about the same.
The extra digits offer a bit more resolution, but it's like using lab powder pans, to check keys of hash, still in plastic wrap. Quite ridiculous.

 

[Dankdad64]

mS is EC

my meter uses the Hanna 500 scale
its easy to convert in my head if I think of 1.0ec as 10 and divide by 2 .... equals 5
or: 600 x 2 = 1200 .... 1.2ec
500ppm = 1.0ec


so add the 4ml to a gallon and see how many ppm
adjust as desired

Its better to go by ec and or ppm rather than how many ml but after awhile if you are feeding the same strength you will know how many milliliters equals what ppm on your meter

A good starting ec for plants in veg is 1.0 - 1.2ec
seedlings more like 0.6 - 0.8ec

View attachment 19100134

Thanks this should help.

 

[@hempy]

Millisiemens/meter to Electrical conductivity unit (mS/m to EC)​

Convert Millisiemens/meter to Electrical Conductivity Unit (mS/m to EC) - Batch Convert - ForEach.id

Convert millisiemens/meter to Electrical Conductivity Unit (mS/m to EC) simply in ForEach.id. You can do batch convert and learn how to convert for all electric conductivity units, refer to conversion table, and instantly convert each and every unit you need using provided tools.

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[Ca++]

Thanks this should help.

Hanna are predominantly using the 500 scale, which is common in the states.

You should keep in mind the 700 scale is common elsewhere, and China may of sent you anything.

Thus the EC reading of 1.0 would be a 500 with Hanna, but 700 with many others. Some even have a switch, or use 640. The ppm isn't measured by meters, they can only measure EC, but can display a rough PPM having done a little math themselves. Maybe 500, maybe 700, it's pretty much a gamble.

Sometimes we here 'conductivity meter' which is a better starting point to explain this. All we can really measure is Electrical Conductivity. That's our EC. The more salt, the more conductivity. Though not all salts are equal. The ppm meter measures EC, then has to make a presumption. The common US 500 standard, is presuming table salt is used. Enough table salt in water to get an EC of 1.0 is going to be 500ppm. It's a look-up table almost. This 500 is used if we talk about TDS. In the EU, Potassium salts are used for hydro. We have TDS meters at 500 to, but PPM for hydro is 700.
In AU, they are split, and not really interested in making a decision, as it's not real anyway.
In professional situations, EC is used, because EC is measured.

Your mileage may vary, if you use ppm. By using EC you talk the universal language. Try to forget about PPM as soon as you can. Any true professional you want to follow will be using EC, and if they did give you an answer in PPM.. well they are not being professional, and their numbers have no meaning. You would have to know what meters they were using. It's just too convoluted, for no reason. Try and switch to EC and all the papers on cannabis will open up to you.

 

[ResinousKingpin]

DO NOT START AT 4ML A & 4ML B PER LITER OF WATER IN COCO WITH CANNA NUTES !
It will burn your plants.
Start with 1/4 -1/5 strenght than increase slowly your nutes.